Human alzheimer&#39;s disease and traumatic brain injury associated tau variants as biomarkers and methods of use thereof

ABSTRACT

The present invention provides detection reagents and method for determining risk of traumatic brain injury (TBI) and/or susceptibility to neurodegenerative disease in a subject.

RELATED APPLICATION

This application claims the benefit of priority of U.S. ProvisionalApplication Ser. No. 62/266,461 filed on Dec. 11, 2015, whichapplication is incorporated by reference herein.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH

This invention was made with government support under W81XWH-14-1-0467awarded by the Department of Defense and R21 AG041472 awarded by theNational Institutes of Health. The government has certain rights in theinvention.

BACKGROUND

Numerous studies have implicated small soluble oligomeric aggregates ofAβ as toxic species in Alzheimer's disease (AD), and increasing evidencealso implicates oligomeric forms of tau as having a direct role indisease pathogenesis of AD and other tauopathies such as FrontotemporalDementia (FTD). As the focus of Aβ studies has slowly shifted towardsoluble Aβ species and mechanisms, new reagents were needed that couldspecifically identify the variety of different aggregate speciespresent. Indeed, many contradictory studies on the role of Aβaggregation in AD were reported and progress impeded because suitablyselective reagents were not available to characterize the aggregatespecies present. Increasing evidence from cell and animal modelsindicate that oligomeric rather than fibrillar forms of tau are toxicand correlate with neuronal degeneration, therefore well characterizedreagents that can specifically recognize the diversity of taumorphologies present in the human brain are critically needed tofacilitate studies to identify the most promising tau species for use asbiomarkers of disease and to study toxic mechanisms.

The microtubule associating protein tau is a major component of theneurofibrillary tangles associated with AD and tauopathies that arecharacterized by hyperphosphorylation and aggregation of tau. Tau playsan important role in assembly and stabilization of microtubules. Tau isa natively unfolded protein, and similar to a number of other nativelyunfolded proteins, it can aberrantly fold into various aggregatemorphologies including β-sheet rich fibrillar forms. The different typesof post-translational modifications of tau in AD includephosphorylation, glycosylation, glycation, prolyl-isomerization,cleavage or truncation, nitration, polyamination, ubiquitination,sumoylation, oxidation and aggregation. Tau has 85 putativephosphorylation sites, and excess phosphorylation can interfere withmicrotubule assembly. Tau can be modified by phosphorylation or byreactive nitrogen and oxygen species among others. Elevated total tauconcentration in CSF has been correlated with AD, as has the presence ofvarious phosphorylated tau forms, and the ratio of tau to Aβ42. Reactivenitrogen and oxygen can modify tau facilitating formation of aggregateforms including oligomeric species. Levels of oligomeric tau have alsobeen implicated as a potential early diagnostic for AD. Therefore, whiledetermination of total tau and phosphorylated tau levels hasdemonstrated value for diagnosis of AD and other tauopathies, reagentsthat can selectively recognize the tau species that are most selectivelyinvolved in AD would have particular value in diagnostics forneurodegenerative diseases including tauopathies and AD.

Tau is an intrinsically unstructured protein due to its very lowhydrophobic content containing a projection domain, a basic proline-richregion, and an assembly domain. Hexapeptide motifs in repeat regions oftau give the protein a propensity to form β-sheet structures whichfacilitate interaction with tubulin to form microtubules as well asself-interaction to form pathological aggregates such as paired helicalfilaments (PHF). Hyperphosphorylation of tau, particularly in theassembly domain, decreases the affinity of tau to the microtubules andimpairs its ability to regulate microtubule dynamics and axonaltransport. In addition, parts of the basic proline-rich domain and thepseudo-repeat also stabilize microtubules by interacting with itsnegatively charged surface. Alternative splicing of the second, thirdand tenth exons of tau results in six tau isoforms of varying length inthe CNS. The assembly domain in the carboxyl-terminal portion of theprotein contains either three or four repeats (3R or 4R) of a conservedtubulin-binding motif depending on alternative splicing of exon 10. Tau4R isoforms have greater microtubule binding and stabilizing abilitythan the 3R isoforms. Human adult brains have similar levels of 3R and4R isoforms, while only 3R tau is expressed at the fetal stage.Mutations altering splicing of tau transcript and the ratio of 3R to 4Rtau isoforms are sufficient to cause neurodegenerative disease.Therefore tau in human brain tissue can exist in a variety of differentlengths and morphologies and with multiple post-translationalmodifications.

Tau plays a critical role in the pathogenesis of AD and studies showthat reduction of tau levels in AD animal models reverses diseasephenotypes and that tau is necessary for the development of cognitivedeficits in AD models caused by over-expression of Aβ. While NFTs havebeen implicated in mediating neurodegeneration in AD and tauopathies,animal models of tauopathy have shown that memory impairment and neuronloss do not associate well with accumulation of NFT. Animal studiesshowed improvement in memory and reduction in neuron loss despite theaccumulation of NFTs, a regional dissociation of neuron loss and NFTpathology, and hippocampal synapse loss and dysfunction and microglialactivation months before the accumulation of filamentous tau inclusions.The pathological structures of tau most closely associated with ADprogression are tau oligomers. All these studies suggest that tautangles are not acutely neurotoxic, but rather that pretangle oligomerictau species are responsible for the neurodegenerative phenotype, similarto toxic role of oligomeric Aβ species.

Numerous studies suggest that extracellular tau species contribute toneurotoxicity through an “infectious” model of disease progression. Forexample, tau pathology spreads contiguously throughout the brain fromearly to late stage disease, extracellular tau aggregates can propagatetau misfolding from the outside to the inside of a cell, brain extractfrom a transgenic mouse with aggregated mutant human tau transmits taupathology throughout the brain in mice expressing normal human tau,induction of pro-aggregation human tau induces formation of tauaggregates and tangles composed of both human and normal murine tau(co-aggregation), and levels of tau rise in CSF in AD, whereas Aβ levelsdecrease. A receptor-mediated mechanism for the spread of tau pathologyby extracellular tau has been described.

Collectively, these studies all indicate that a variety of different tauforms including splice variants, post-translational modifications anddifferent aggregated forms, both intracellular and extracellular, arevitally important in AD and other tauopathies. In order to more clearlydefine the role of individual tau forms in disease, there is a criticalneed to develop a series of well-defined reagents that selectivelyrecognize individual tau species, and to use these reagents to identifywhich tau forms are the best biomarkers for AD, which forms are involvedin toxicity, and which forms can distinguish between healthy and ADpatients in brain tissue and CSF samples.

SUMMARY

Methods have been developed that enable generation of reagents thatselectively bind disease related protein variants. The inventors havedeveloped methods and reagents to assess neuronal damage followingtraumatic brain injury (TBI). The inventors have also developed methodsand reagents to assess the staging of Alzheimer's Disease (AD). Phagedisplay antibody libraries are used as a source to isolate the proteinvariant specific reagents.

The present invention discloses an antibody or antibody fragment thatpreferentially recognizes human traumatic brain injury (TBI)-associatedtau and other antibody or antibody fragments that preferentiallyrecognize different stages of AD. As used herein, the phrase“preferentially recognizes” indicates that it does not bind to orrecognize non-TBI associated forms of tau or non-specific proteins. Asused herein, the term “antibody” includes scFv (also called a“nanobody”), humanized, fully human or chimeric antibodies, single-chainantibodies, diabodies, and antigen-binding fragments of antibodies(e.g., Fab fragments).

In certain embodiments, the antibody is an antibody fragment that doesnot contain the constant domain region of an antibody.

In certain embodiments, the antibody fragment is less than 500 aminoacids in length, such as between 200-450 amino acids in length, or lessthan 400 amino acids in length. In certain embodiments, the antibody hasan amino acid sequence having at least 80% sequence identity of any oneof SEQ ID NO: 42, 44, 46, or 48. In certain embodiments, the amino acidsequence has at least 90% sequence identity of any one of SEQ ID NO: 42,44, 46, or 48. In certain embodiments, the amino acid sequence has atleast 95% sequence identity of any one of SEQ ID NO: 42, 44, 46, or 48.In certain embodiments, the amino acid sequence has 100% sequenceidentity of any one of SEQ ID NO: 42, 44, 46, or 48. In certainembodiments, the present invention discloses a nucleic acid that encodesan antibody that preferentially recognizes human traumatic brain injury(TBI)-associated tau. In certain embodiments, the present inventionprovides a nucleic acid encoding an antibody that preferentiallyrecognizes TBI-associated tau, wherein the nucleic acid has at least 80%sequence identity of any one of SEQ ID NO: 41, 43, 45, or 47. In certainembodiments, the nucleic acid sequence has at least 90% sequenceidentity of any one of SEQ ID NO: 41, 43, 45, or 47. In certainembodiments, the nucleic acid sequence has at least 95% sequenceidentity of any one of SEQ ID NO: 41, 43, 45, or 47. In certainembodiments, the nucleic acid sequence has 100% sequence identity of anyone of SEQ ID NO: 41, 43, 45, or 47.

In certain embodiments, the present invention provides an antibody thatpreferentially recognizes a human Alzheimer's Disease (AD)-associatedTau.

In certain embodiments, the antibody is an antibody fragment that doesnot contain the constant domain region of an antibody.

In certain embodiments, the antibody fragment is less than 500 aminoacids in length, such as between 200-450 amino acids in length, or lessthan 400 amino acids in length. In certain embodiments, the antibody hasan amino acid sequence having at least 80% sequence identity of any oneof SEQ ID NO: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30,32, 34, 36, 38, or 40. In certain embodiments, the amino acid sequencehas at least 90% sequence identity of any one of SEQ ID NO: 2, 4, 6, 8,10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, or 40. Incertain embodiments, the amino acid sequence has at least 95% sequenceidentity of any one of SEQ ID NO: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20,22, 24, 26, 28, 30, 32, 34, 36, 38, or 40. In certain embodiments, theamino acid sequence has 100% sequence identity of any one of SEQ ID NO:2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38,or 40.

In certain embodiments, the present invention discloses a nucleic acidthat encodes an antibody that preferentially recognizes humanAD-associated tau. In certain embodiments, the present inventionprovides a nucleic acid encoding an antibody that preferentiallyrecognizes a human AD-associated tau, wherein the nucleic acid has atleast 80% sequence identity of any one of SEQ ID NO: 1, 3, 5, 7, 9, 11,13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, or 39. In certainembodiments, the nucleic acid has at least 90% sequence identity of anyone of SEQ ID NO: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29,31, 33, 35, 37, or 39. In certain embodiments, the nucleic acid has atleast 95% sequence identity of any one of SEQ ID NO: 1, 3, 5, 7, 9, 11,13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, or 39. In certainembodiments, the nucleic acid has 100% sequence identity of any one ofSEQ ID NO: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31,33, 35, 37, or 39.

In certain embodiments, the present invention provides a vectorcomprising a nucleic acid described above.

In certain embodiments, the present invention provides a phagecomprising the vector described above.

In certain embodiments, the present invention provides a method fordetermining risk of traumatic brain injury (TBI), assessment of theamount of neuronal damage, and/or susceptibility to neurodegenerativedisease in a human, comprising the steps of:

(A) providing a sample obtained from a subject post-injury;

(B) detecting levels of human TBI-associated tau in the sample;

(C) comparing the TBI-associated tau protein level in the sample withTBI-associated tau protein level in a normal control; and

(D) determining whether the human has a risk of TBI in accordance withthe result of step (C);

wherein a subject having elevated TBI-associated tau protein has a highrisk of TBI.

In certain embodiments, the present invention provides a method fordetermining the stage of Alzheimer's disease (AD) in a human, comprisingthe steps of:

-   -   (A) providing a sample obtained from a human;    -   (B) detecting levels of stage-specific human AD-associated tau        in the sample;    -   (C) comparing the AD-associated tau protein level in the sample        with AD-associated tau protein level in a normal control; and    -   (D) determining whether the subject has a risk of AD in        accordance with the result of step (C);

wherein a subject having elevated AD-associated tau protein has a highrisk of AD.

In certain embodiments, the samples and the normal control are bloodproduct samples or cerebrospinal fluid (CSF) samples.

In certain embodiments, the blood product is serum.

In certain embodiments, the detecting in step (B) is by means of aligand specific for the protein.

In certain embodiments, the ligand is an antibody.

In certain embodiments, the ligand is a scFv.

In certain embodiments, the protein levels are detected by means ofELISA.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1: Immunohistochemistry stain of human AD and control brain tissueslices showing increased presence of phosphorylated tau fibrils in thehuman AD tissue compared to the age matched cognitively normal sample.Tau was stained using the commercially available anti-phospho-tauantibody AT8.

FIG. 2: Dotblot assay confirming the presence of immunoprecipitated taufrom TBI and control CSF samples in the IP elutes followingimmunoprecipitation protocol.

FIGS. 3a and 3b . FIG. 3a : Western blot of human AD and control braintissue homogenates staining with polyclonal tau antibody shows presenceof increased molecular weight tau species in AD patient sample comparedto ND sample. Staining with the anti-phosphorylated tau antibody, AT8shows presence of high molecular weight phosphorylated tau species inthe AD sample with no phosphorylated tau species in the ND sample. FIG.3b : Western blot of human AD and control brain tissue homogenates afterimmunoprecipitation with polyclonal anti-tau antibody. Staining withanti-phosphorylated tau antibody AT8, shows presence of high molecularweight phosphorylated tau species in AD sample with its absence in theND sample.

FIG. 4: Negative panning against bovine serum albumin.

FIG. 5: Negative panning against aggregated α-synuclein.

FIG. 6: Negative panning against AD Braak stage I tissue.

FIG. 7: Negative panning against AD Braak stage I tau IP (Black arrowindicates phage).

FIG. 8: Flow diagram indicating steps in the panning protocol. Negativeselection to remove non-specific clones was followed by positiveselection with tau immunoprecipitated from AD Braak stage III and Braakstage V.

FIG. 9: Indirect ELISA assay testing different AD tau phage clones withpooled AD brain tissue homogenates. X axis represents the various clonesand Y axis represents luminescence signal ratio to ND controls. All theclones have high levels of binding to AD tissue (Braak stage III and V)compared to the controls.

FIG. 10: Indirect ELISA of clone 51A with individual AD brain tissuehomogenates. 7 samples (Braak V), 2 samples (Braak III) and 2 samples(Braak I) were tested. This clone binds tau morphologies present in ADBraak stage III.

FIG. 11: Indirect ELISA of clone 51F with individual AD brain tissuehomogenates. 7 samples (Braak V), 2 (Braak III) and 2 (Braak I) weretested. This clone binds tau morphologies in AD Braak stage V.

FIG. 12: Sandwich ELISA with AD clones 51A and M58C with 5 AD serasamples. X-Axis represents individual sera samples and Y-Axis representsratio to healthy control. Both the clones selectively bind to taumorphologies present in AD sera over healthy control.

FIG. 13: Indirect ELISA of TBI clones with pooled TBI and control CSF. Xaxis represents the TBI clones and Y axis represents ratio to no samplecontrol. Most of the clones had high levels of binding to TBI comparedto control.

FIG. 14: Indirect ELISA of TBI clones with individual TBI (4 samples)and pooled control CSF. X axis represents the TBI clones and Y axisrepresents ratio to control CSF. Most of the clones have high levels ofbinding to TBI samples.

FIG. 15: Sandwich ELISA of clone T2B with 18 TBI sera samples and 3healthy aged controls. X-Axis represents individual sera samples andY-Axis represents ratio to no sample control. T2B selectively binds totau species that possibly circulates in TBI individuals several yearsafter their head trauma when compared to healthy controls.

DETAILED DESCRIPTION

A vast number of studies have correlated protein aggregation withneurodegenerative diseases including AD, Parkinson's and Dementia withLewy Bodies. Numerous recent studies suggest that specific proteinvariants including selected oligomeric forms of these proteins areinvolved in neuronal toxicity and can interfere with important functionsincluding long term potentiation. Various soluble oligomeric species ofAβ and a-syn have been shown to occur early during the course of AD andPD, and increasing evidence implicates oligomeric forms of tau in AD andother tauopathies.

A novel biopanning technology has been developed that combines theimaging capability of Atomic Force Microscopy (AFM) with the diversityof antibody libraries. This unique combination of antibody diversity andimaging capability allows for the isolation of single chain antibodyvariable domain fragment (scFv or nanobody) reagents to an array ofmorphologies of key proteins involved in neurodegenerative diseasesincluding Aβ and alpha-synuclein (a-syn). Nanobodies have been isolatedthat specifically recognize monomeric, fibrillar, and two differentoligomeric a-syn morphologies. The anti-oligomeric a-syn nanobodies donot cross react with oligomeric Aβ, and specifically label PD braintissue but not AD or healthy tissue. In addition, nanobodies wereisolated to different regions of full length Aβ and to three distinctnaturally occurring oligomeric Aβ morphologies. One, A4, specificallyrecognizes a larger oligomeric Aβ species, inhibits aggregation andextracellular toxicity of Aβ, does not cross react with oligomerica-syn, and specifically labels Aβ aggregates in human AD brain samples,but not PD or healthy brain tissue. A second nanobody, E1, recognizes asmaller trimeric or tetrameric Aβ species, and similar to A4 inhibitsaggregation and extracellular toxicity of Aβ, does not cross react witholigomeric a-syn, and labels Aβ aggregates in human AD but not healthybrain tissue. Utilizing an AD brain derived oligomeric Aβ preparation, athird nanobody, C6, was isolated that specifically recognizes oligomericAβ species derived from human AD brain tissue, but does not recognize Aβaggregates generated in vitro. The different specificities of eachnanobody can be readily observed when each nanobody is expressed on thesurface of a filamentous bacteriophage and antibody/antigen complexesare imaged by AFM. Therefore, the combination of antibody libraries andAFM imaging technologies enables the isolation and characterization ofreagents that recognize specific protein variants including a variety ofdifferent naturally occurring aggregated forms of both a-syn and Aβ.

Another powerful advantage of this AFM palming protocol is that not onlyis it possible to isolate and characterize reagents to specific proteinmorphologies, but it is possible to do so using only picograms or lessof material. In addition the sample does not need to be purified, andthe protein does not need to be chemically modified in any way. It ispossible to actually isolate nanobodies against a single molecule of thetarget antigen. This unique ability to generate and characterizereagents that specifically recognize individual protein variantsprovides the means to generate reagents that selectively recognize anarray of different tau variants present in human AD brain.

While several reagents already exist that can recognize monomeric andphosphorylated tau, these reagents cannot distinguish between differentaggregated states of tau. Reagents that can detect specific forms of taucan provide very powerful tools to facilitate diagnosis of AD and othertauopathies and to follow progression of these diseases or to evaluatetherapeutic strategies. While many neurodegenerative diseases haveoverlapping clinical symptoms and cellular and biochemical mechanismssuch as an increase in inflammatory markers, and aggregation of similarproteins, the reagents presently developed have well definedspecificities and selectivities for selected tau forms and facilitatespecific diagnoses of AD and other tauopathies. In combination withother protein and morphology specific reagents against Aβ and a-synspecies, these reagents can be used to detect the presence of biomarkerswhich can readily detect and distinguish many related neurodegenerativediseases including AD, PD, FTD and LBD.

In addition to the unique reagents and ELISA protocol, other advantagesof this proposal over previous studies include the use of postmortemtissue and CSF from cases with neuropathologically confirmed AD; the useof control subjects who have had standardized neuromotor assessment andpostmortem neuropathologic examination, ensuring that they are not inpreclinical stages of AD or other neurodegenerative disease, and the useof a significant number of cases, compensating for individual variationas well as allowing stratification for possible significant influenceson disease severity.

Traumatic Brain Injury

It is well established that chronic stress and especially traumaticbrain injury (TBI) can disrupt cognitive functioning. The brain is verysensitive to stress and injury and responds by expressing a variety ofneuromorphological and neurochemical changes. Stress induces increasesin expression levels in the hippocampus of the Amyloid Precursor Protein(APP) and BACE-1, a protease which cleaves APP. These increases are ofparticular relevance for soldiers suffering TBI since similar increasesin hippocampal expression of APP and BACE-1 are strongly linked with theonset and progression of Alzheimer's disease (AD). BACE-1 cleavage ofAPP results in generation of the beta-amyloid (Aβ) protein, the primarycomponent of the hallmark amyloid plaques associated with AD. Numerousstudies have indicated that patients suffering brain trauma are atgreater risk of developing AD and at an earlier age. The brainexperiences very high sheer forces and mechanical deformation followingTBI, and neuronal axons, particularly in the white matter are verysusceptible to injury. Resulting damage to the neuronal axons can impairprotein transport leading to accumulation of proteins and swellingcausing the typical axon pathology observed with TBI. Various forms ofstress induce memory deficits in mice and rats, with accompanyingincreases in APP, BACE-1 and Aβ levels.

Increased expression of APP and BACE-1 results in increased productionof Aβ, which in turn can promote aggregation of this nativelyunstructured protein into a variety of soluble aggregate species some ofwhich are potent neurotoxins that inhibit long term potentiation andother neuronal functions. Aβ can also self-assemble into much largeraggregates which eventually form the distinctive insoluble amyloidfibrils which are a hallmark of AD brain tissue. A vast amount ofliterature implicates Aβ accumulation as being central to theprogression of AD, leading to formation of the Aβ hypothesis. The majorweakness of the Aβ hypothesis however, is that the presence of amyloidplaques does not correlate well with the progression of AD. While Aβ canform amyloid plaques, it also forms a number of soluble intermediate ormetastable structures which may contribute to toxicity. Cortical levelsof soluble Aβ correlated well with the cognitive impairment and loss ofsynaptic function. Small, soluble aggregates of Aβ termed Aβ-deriveddiffusible ligands and spherical or annular aggregates termedprotofibrils are neurotoxic. Oligomeric forms of Aβ, created in vitro orderived from cell cultures inhibit long term potentiation. Theconcentration of oligomeric forms of Aβ is also elevated in transgenicmouse models of AD and in human AD brain and CSF samples. Disruption ofneural connections near Aβ plaques was also attributed to oligomeric Aβspecies. A halo of oligomeric Aβ surrounds Aβ plaques causing synapseloss, and oligomeric Aβ was shown to disrupt cognitive function intransgenic animal models of AD. Different size oligomers of Aβ have beencorrelated with AD, including a 56 kD aggregate and smaller trimeric andtetrameric species. Therefore, the presence of oligomeric Aβ is stronglycorrelated with neuronal dysfunction and memory deficits followingneuronal damage and plays a critical role in progression of AD.

Given the critical role of APP and BACE-1 in cognitive deficitsassociated with AD, it is likely that similar increases in APP andBACE-1 levels induced by stress and injury to the brain also lead toelevated Aβ levels, promoting formation of neurotoxic aggregate species,and subsequent memory loss and neuronal dysfunction. Following inducedtrauma to the brain, substantial deposition of non-fibrillar Aβaggregates has been observed throughout the brain, even after only asingle event. Significantly, when TBI is induced in animal models of AD,there is a substantial increase in neuronal death, memory disorders, andAβ accumulation, but no corresponding increase in Aβ plaque deposition,there was even a decrease in observed plaques. A preponderance ofstudies now indicate that various soluble oligomeric Aβ aggregates playa very critical role in neuronal dysfunction rather than the hallmarkfibrillar Aβ plaques that have long been associated with AD. An observedincrease in Aβ levels in CSF samples from TBI patients suggests thatdetection of specific Aβ species in CSF and serum represents a promisingroute for early detection of AD like brain injury in soldiers sufferingTBI.

Since TBI also induces axonal injury and damage to protein transportmechanisms, neurofilament proteins may also play a role in TBI and AD.Neurofilament proteins accumulate in axons following TBI, and severalstudies have implicated the neurofilament protein tau in this process.The second major pathological feature of AD brains is the presence ofneurofibrillary tangles that contain aggregates of the microtubuleassociated protein, tau. Tau is also a natively unfolded protein similarto Aβ, and can aberrantly fold into various aggregate morphologiesincluding β-sheet containing fibrillar forms and different oligomericspecies. Tau plays an important role in assembly and stabilization ofmicrotubules and can undergo numerous post-translational modificationsincluding phosphorylation, glycosylation, glycation,prolyl-isomerization, cleavage or truncation, nitration, polyamination,ubiquitination, sumoylation, oxidation and aggregation. Tau has 85putative phosphorylation sites, and excess phosphorylation can interferewith microtubule assembly. Elevated total tau concentration in CSF hasbeen correlated with AD, as has the presence of various phosphorylatedtau forms and the ratio of tau to Aβ42. In addition to phosphorylation,tau can be modified by reactive nitrogen and oxygen species, leading tomodified tau forms that are prone to assemble into aggregate speciesincluding different oligomeric forms. Levels of oligomeric tau have alsobeen implicated as a potential early diagnostic for AD. Therefore,determination of total tau, phosphorylated tau and oligomeric tauconcentrations all have potential value as diagnostics forneurodegenerative disorders including tauopathies, AD and TBI.

Tau is a very complex protein in vivo as alternative splicing of thesecond, third and tenth exons of tau result in generation of six tauisoforms of varying length in the CNS. The assembly domain in thecarboxyl-terminal portion of the protein contains either three or fourrepeats (3R or 4R) of a conserved tubulin-binding motif depending onalternative splicing of exon 10. Tau 4R isoforms have greatermicrotubule binding and stabilizing ability than the 3R isoforms. Humanadult brains have similar levels of 3R and 4R isoforms, whereas only 3Rtau is expressed at the fetal stage. In tauopathies, mutations alteringthe splicing of tau transcript and the ratio of 3R to 4R tau isoformsare sufficient to cause neurodegenerative disease. Therefore tau inhuman brain tissue can exist in a variety of different lengths andmorphologies and with multiple post-translational modifications.

Tau plays a critical role in the pathogenesis of AD and studies showthat reduction of tau levels in AD animal models reverses diseasephenotypes and that tau is necessary for the development of cognitivedeficits in AD models caused by over-expression of Aβ. While NFTs havebeen implicated in mediating neurodegeneration in AD and tauopathies,animal models of tauopathy have shown that memory impairment and neuronloss do not associate well with accumulation of NFT. In animal modelsexpressing human tau, neurodegeneration-related phenotypes includingbehavioral impairments, neuronal loss, and synapse lesions correlatebetter with the presence of soluble tau oligomers and pre-filamentspecies than with fibrillar NFT levels. Neuronal loss also precedes NFTformation suggesting involvement of other species such as oligomeric tauvariants. In addition, animal studies showed that hippocampal synapseloss and dysfunction and microglial activation occurred months beforethe accumulation of filamentous tau inclusions. Both brain derived andrecombinant oligomeric tau aggregate species disrupt intracellularcalcium levels and are toxic to cultured human neuronal cells when addedextracellularly. The pathological structures of tau most closelyassociated with AD progression were shown to be tau oligomers. Inpostmortem human brains, high oligomeric tau levels were detected in thefrontal lobe cortex at early stages of AD before the presence of NFTs.Oligomeric tau may also be responsible for transmission of pathologywith a prion-like mechanism as NFT tau pathology spreads from brainregions seeded with oligomeric tau into other regions resulting inaggregation of endogenous tau. It has been previously shown usingrecombinant human tau (rhTau) that extracellular trimeric, but notmonomeric or dimeric species are toxic to human neuronal cells.

All these studies suggest that tau tangles are not acutely neurotoxic,but rather that pretangle oligomeric tau species are responsible for theneurodegenerative phenotype, similar to toxic role of oligomeric Aβspecies. Therefore both toxic oligomeric Aβ and tau species in CSF andserum have promise as early biomarkers for AD and for AD like damage inTBI patients.

Similar to the role of Aβ and tau in AD, aggregation of alpha-synuclein(a-syn) plays a critical role in PD and synucleinopathies. A-syn is amajor component of Lewy bodies and neurites. Wild-type a-syn along withthe three mutant forms, A30P, E46K and A53T can assemble into Lewy bodylike fibrils in vitro. Since all of the mutations increase the totalrate of oligomerization compared to the wild-type form of a-syn, it hasbeen postulated that the intermediate oligomeric morphologies of a-synare the toxic structures in PD rather than fibrils. A partially foldedintermediate of a-syn helps to promote fibril formation in vitro and aprotofibrillar form of a-syn is stabilized by formation of a dopamineadduct complex, suggesting a possible connection between this morphologyof a-syn and dopaminergic cell death. The different morphologies ofa-syn also have different affinities for various membranes, and both theoligomeric forms and fibrillar forms have been shown to disrupt membranepermeability and integrity. Aggregated forms of a-syn were shown toinduce toxicity in dopaminergic neurons in vivo and several differentoligomeric morphologies were shown to each have different toxicmechanisms and effects on cells. We have shown that oligomeric but notfibrillar forms of a-syn are toxic to neuronal cells. Toxic oligomerica-syn forms were identified in living cells, in human plasma from PDpatients, and in human PD brain tissue indicating that oligomeric a-synis also a good biomarker for neuronal damage.

Clearly protein misfolding and aggregation is critically important inmany devastating neurodegenerative diseases. Therefore, determining howconcentration profiles of selected key forms and morphologies of Aβ, tauand a-syn vary in AD, TBI and cognitively normal patients willfacilitate development of an effective diagnostic assay for thesediseases. In order to assess the value of these protein aggregates asbiomarkers in neuronal disease, highly specific reagents are needed thatcan selectively identify the different toxic protein species. Our labhas developed unique technology that enables us to isolate reagents thatbind specific morphologies of a target protein. We have combined theimaging capabilities of AFM with the binding diversity of phage displayantibody technology to allow us to identify the presence of specificprotein morphologies and then isolate reagents that bind a targetmorphology. These morphology specific reagents have promise forassessing whether the specific toxic aggregate species in human samplessuch as serum, plasma or CSF are useful biomarkers for neuronal damage.CSF levels of Aβ and tau have been useful to predict AD, howeverbiomarker studies of TBI patients have been less successful, where S100Bhas been the only marker to consistently predict TBI and outcome. S100Bis a calcium binding protein that has been implicated in variousdiseases including AD, diabetes, melanoma and epilepsy, so its use inpredicting TBI may be limited. We have developed a series of morphologyspecific nanobodies that have great promise for distinguishing betweendifferent neurodegenerative diseases. These nanobodies selectivelyrecognize toxic protein aggregate biomarkers that are associated withspecific diseases, therefore these nanobodies are recognizing biomarkersthat are associated with the onset and progression of specific diseases,rather than recognizing a more generic secondary effect such asinflammatory signals, microglial activation or apoptotic markers. Wehave shown that three different nanobodies against different oligomericAβ species all selectively distinguish between AD and PD or healthysamples in post-mortem human tissue and CSF samples. We have similarlyshown that two different nanobodies against different toxic oligomerica-syn species both selectively distinguish between PD and AD or healthypost-mortem human tissue and CSF samples. When we assayed post-mortemtissue, CSF and serum samples from AD, PD and cognitively normalpatients with our anti-oligomeric Aβ, a-syn and tau nanobodies, we cannot only readily distinguish AD, PD and normal samples but we can alsostage progression of these different diseases. Also in the preliminarydata section and of direct relevance to this proposal, we show that wecan not only detect the presence of toxic oligomeric morphologies of Aβ,tau and a-syn in ante-mortem human serum samples, but that there is avery distinct spike in oligomeric Aβ species in serum many years priorto diagnosis of AD, and even several years prior to diagnosis ofmild-cognitive impairment (MCI) suggesting that we canpresymptomatically diagnose AD by analysis of serum samples many yearsbefore symptoms of AD occur. Since early, even presymptomatic diagnosisof AD is critical so that preventative and treatment therapies can beginbefore extensive neuronal damage has occurred, the studies proposed herehave very high potential impact. The morphology specific nanobodies wehave developed and other nanobodies that have been developed arepowerful tools to characterize human tissue, CSF and serum samples andto distinguish between different neurodegenerative diseases. Since thenanobodies recognize toxic species that should be present at earlystages of disease progression, these nanobodies should be useful asearly presymptomatic biomarkers for different neurodegenerativediseases, and to identify soldiers who are susceptible to AD followingTBI.

The following human AD-associated Tau clone sequences were identified:

Clone 32B: (SEQ ID NO: 1)GATTACNGCCAAGCTTGCATGCAAATTNTATTTCAAGGAGNCAGTCATAATGAAATACNTATTGCCTNCGNCAGCCGCTGGATTGTTATTACTCGCGGCCCAGCCGGCCATGGCCGAGGTGCAGCTGTTGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTTAGCAGCTATGCCATGAGCTGGGTCCGCCAGGCTCCAGGGAAGGGGCTGGAGTGGGTCTCATCTATTTCTTCTAATGGTGATGATACAGCTTACGCAGACTCCGTGAAGGGCCGGTTCACCATCTCCAGAGACAATTCCAAGGACACGCTGTATCTGCAAATGAACAGCCTGAGAGCCGAGGACACGGCCGTATATTACTGTGCGAAAGCTAATAATTCTTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCGAGCGGTGGAGGCGGTTCAGGCGGAGGTGGCAGCGGCGGTGGCGGGTCGACGGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATAATGCATCCACTTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGGATAGTGCTACTCCTTATACGTTCGGCCAAGGGACCAAGGTGGAAATCAAACGGGCGGCCGCACATCATCATCACCATCACGGGGCCGCAGAACAAAAACTCATCTCAGAAGAGGA TCTGAATGGGGCCGC32B AA sequence: (SEQ ID NO: 2)MKYXLPXXAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSSISSNGDDTAYADSVKGRFTISRDNSKDTLYLQMNSLRAEDTAVYYCAKANNSFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYNASTLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQDSATPYTFGQGTKVEIKRAAAHHHHHHGAAEQKLISEEDLNGA Clone 51A:(SEQ ID NO: 3) TATGANCCATGATTACGCCAAGCTNNCATGCAANNTNTATTTTCAAGGAGACAGTCATAATGAAATACCTATTGCNTACGNCAGCCGCTNNGATTGTTATTACTCGCGGCCNCAGCCGGCCATGGCCGAGGTGCAGCTGTNGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTTAGCAGNTATGCCATGAGCTGGGTCCGCCAGGCTCCAGGGAAGGGGCTGGAGTGGGTCTCATAGATTTAGCAGTCGGGTCCGGTTACATCTTACGCAGACTCCGTGAAGGGCCGGTTCACCATCTCCAGAGACAATTCCAAGAACACGCTGTATCTGCAAATGAACAGCCTGAGAGCCGAGGACACGGCCGTATATTACTGTGCGAAACGTCAGTTGATGTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCGAGCGGTGGAGGCGGTTCAGGCGGAGGTGGCAGCGGCGGTGGCGGGTCGACGGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATGCTGCATCCAGTTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGAGTTACAGTACCCCTAATACGTTCGGCCAAGGGACCAAGGTGGAAATCAAACGGGCGGCCGCACATCATCATCACCATCACGGGGCCGCAGAACAAAAACTCATCTCAGAAGAGGATCTGAATGGGCCGCATAG 51A AA sequence: (SEQ ID NO: 4)MAEVQLXESGGGLVQPGGSLRLSCAASGFTFSXYAMSWVRQAPGKGLEWVSIQSGPVTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKRQLMFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYAASSLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQSYSTPNTFGQGTKVEIKRAAAHHHHHHGAAEQKLISEEDLNGPH Clone 51F: (SEQ ID NO: 5)ATTNCGCCAAGCTNNCATGCAAAATTTNTATTTNAANGGAGACAGTCATAATGAAATACCTATTGCNTACNNNNNNNCGCTGGATTGTTATTACTCGCGGNNCAGCCGGCCATGGCCGAGGTGCAGCTGTTGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTNTCCTGTGCAGCNTCTGGATTCACCTTTAGCAGCTATGCCATGANNTGGGTCCGCCAGGCTCCAGGGAAGGGGCTGNNNNNNGTNTCATCTATTACGTAGACGGGTTCGTAGACACAGTACGCAGACTCCGTGAAGGGCAGGTTCACCATCTCCAGAGACAATTCCAAGAACACGCTGTATCTGCAAATGAACAGCCTGAGAGCCGAGGACACGGCCGTATATTACTGTGCGAAACAGCATGATGATTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCGAGCGGTGGAGGCGGTTCAGGCGGAGGTGGCAGCGGCGGTGGCGGGTCGACGGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATACTGCATCCAATTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTNTGCAACCTGAAGATTTTGCAACTTANTACTGTCAACAGCTGGATGTGTNTCCTTNGACGTTCGGNCAANNNACCAAGGTGGAAATCAA 51F AA sequence:(SEQ ID NO: 6) MAEVQLLESGGGLVQPGGSLRXSCAXSGFTFSSYAMXWVRQAPGKGLXXXSSITTGSTQYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKQHDDFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYTASNLQSGVPSRFSGSGSGTDFTLTISSXQPEDFATXYCQQLDVXPXT FXQXTKVEIClone 52H: (SEQ ID NO: 7)GAGACAGTCATAGCTAGCATGAAAAAGANTTGGCTGGCGCTGGCTGGTTTAGTTTTagCGTTTAGCGCATCGGCGGACTACAAAGAGGCCCAGCCGGCCATGGACCTGGGTAAGAAACTGCTGGAAGCTGCTCGTGCTGGTCAGGACGACGAAGTTCGTATCCTGATGGCTAACGGTGCTGACGTTAACGCTGACGACTACGAAGGTTGGACTCCGCTGCACCTGGCTGCTATGGTTGGTCACCTGGAAATCGTTGAAGTTCTGCTGAAGTACGGTGCTGACGTTAACGCTCAGGACAAATTCGGTAAGACCGCTTTCGACATCTCCATCGACAACGGTAACGAGGACCTGGCTGAAATCCTGCAAGCGGCCGCACATCATCATCACCATCACGGGGCCGCAGAACAAAAACTCATCTCAGAAGAGGATCTGAATGGGGCCGCATAGACTGTTGAAAGTTGTTTAGCAAAACCTCATACAGAAAATTCATTTACTAACGTCTGGAAAGACGACAAAACTTTAGATCGTTACGCTAACTATGAGGGCTGTCTGTGGAATGCTACAGGCGTTGTGGTTTGTACTGGTGACGAAACTCAGTGTTACGGTACATGGGTTCCTATTGGGCTTGCTATCCCTGAAAATGAGGGTGGTGGCTCTGANGGTGGCGGTTCTGAGGGTGGCGGTTCTGANGGTGGCGGTACTAAACCTCCTGAGTACGGTGATACACCTATTCCGGGCTATACTTATATCAACCCTCTCGACNGCACTTATCCGCCTGGTACTGAGCAAAACCCCGCTAATCCTAATCCCTTCTCTTGAGGAGTCTCAGCCTCTTAATACTTTCATGTTTCANAATAATANNTTCCGAAATNNNCNNGGTGCATTAACTGTTTATACNGGCACTGTTACTCNANNNACTGACCCCCGTTTAAAACTTATTACCAGTACACTCCNTG NNATCAT52H AA sequence: (SEQ ID NO: 8)MKKXWLALAGLVLAFSASADYKEAQPAMDLGKKLLEAARAGQDDEVRILMANGADVNADDYEGWTPLHLAAMVGHLEIVEVLLKYGADVNAQDKFGKTAFDISIDNGNEDLAEILQAAAHHHHHHGAAEQKLISEEDLNGAA Clone M32B: (SEQ ID NO: 9)TTCAGGAGANAGTCNTAATGAAATACCTATTGCCTACGGCAGCCGCTGGAtTGTTATTACTCGCGGNCCAGCCGGCCATGGCCGAGGTGCAGCTGTTGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTTAGCAGCTATGCCATGAGCTGGGTCCGCCAGGCTCCAGGGAAGGGGCTGGAGTGGGTCTCAGGTATTTCTAATAATGGTAGTAATACAACTTACGCAGACTCCGTGAAGGGCCGGTTCACCATCTCCAGAGACAATTCCAAGAACACGCTGTATCTGCAAATGAACAGCCTGAGAGCCGAGGACACGGCCGTATATTACTGTGCGAAAGCTTCTTATACTTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCGAGCGGTGGAGGCGGTTCAGGCGGAGGTGGCAGCGGCGGTGGCGGGTCGACGGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATAGTGCATCCTCTTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGTATTCTGGTTCTCCTGCTACGTTCGGCCNAGGGACCAAGGTGGAAATCANACGGGCGGCCGCACNTCATCATNNCCATCACGGGGCCGCAGAANNAAAACTCATCTCAGAAGAGGANNTGAATGGGGCCGCATAGACTGTT M32B AA sequence:(SEQ ID NO: 10) MKYLLPTAAAGLLLLAXQPAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSGISNNGSNTTYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKASYTFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYSASSLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQYSGSPATFGXGTKVEIXRAAAXHHXHHGAAEXKLISEEX Clone M32E:(SEQ ID NO: 11) TTCAGGANANAGTCATAATGAANTACCTATTGCCTACGGCAGCCGCTGGANTNNTATTACTCGCGGCCCAgCCGGCCATGGCCCANGTGCAGCTGGTGGAGTCTGGGGGAGGCGTGGTCCAGCCTGGGAGGTCCCTGAGACTCTCCTGTGCAGNCTCCGGATTCACCTTTANCAGCTATGACATGGGCTGGGTCCGCCAGGCTCCAGGGAAGGGGCTGGAGTGGGTCTCAAGTATTAGTGGTAGTGGTCCTACCATGAACTACGCANACTCTGTGAAGGGCCGATTCACCGTCTCCAGAGACAATTCCAAGAACACGCTGTATCTGCAAATGGACAGCCTGAGAGCCGAGGACACGGCCGTATATTACTGTGCGAAAGGGGGTACGGACTTTGACTACTGGGGCCAGGGCACCCTGGTCACCGTCTCCTCAGGNGGAGGCGGTTCANGCGGAGGTGGCTCTGGCGGTGGCGGATCGTCTGAGCTGACTCAGGACCCTGCTGTGTCTGTGGCCTTGGGACAGACAGTCANCATCACATGCCAAGGANACAGCCTCNNAACCTATTATGCAAGCTGGTACCANCANAAGCCAGGACAGGCCCCTGTACTTGTCATCTATGGNAAAAACAACCGGCCCTCANGGATCNCAGACCGATTCTCTGGCTCCAGCTCANGAAACACAGCTTCCTTGACCATCACTGNGGCTCAGGCGGAAGATGAGGCTGACTATTACTGNAACTCCCGGGACAGCAGTGNNAACCATCTNANGAGTGTTCGGCGGAGGGANCNNGCTGACCGNCNTANGTGCGGCCGCAGNANCNNNNNCTNCNNNTCAGAANANGATCTGAATGGGGCNNCATANACTGTTGNAAANNNGNTTANCAA M32E AA sequence:(SEQ ID NO: 12) MXYLLPTAAAGXXLLAAQPAMAXVQLVESGGGVVQPGRSLRLSCAXSGFTFXSYDMGWVRQAPGKGLEWVSSISGSGPTMNYAXSVKGRFTVSRDNSKNTLYLQMDSLRAEDTAVYYCAKGGTDFDYWGQGTLVTVSSXGGGSXGGGSGGGGSSELTQDPAVSVALGQTVXITCQGXSLXTYYASWYXXKPGQAPVLVIYXKNNRPSXIXDRFSGSSSXNTASLTITXAQAEDEADYYXNSRDSSXNHXXSVRRR Clone M33F: (SEQ ID NO: 13)TTCAGGAGANAGTCNTAATGAAATACCTATTGCCTACGGCAGCCGCTGGATTGTTATTACTCGCGGCCCAGCCGGCCATGGCCGAGGTGCAGCTGTTGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTTAGCAGCTATGCCATGAGCTGGGTCCGCCAGGCTCCAGGGAAGGGGCTGGAGTGGGTCTCAGCTATTACTAATGATGGTGCTGGTACAACTTACGCAGACTCCGTGAAGGGCCGGTTCACCATCTCCAGAGACAATTCCAAGAACACGCTGTATCTGCAAATGAACAGCCTGAGAGCCGAGGACACGGCCGTATATTACTGTGCGAAATCTTATACTGGTTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCGAGCGGTGGAGGCGGTTCAGGCGGAGGTGGCAGCGGCGGTGGCGGGTCGACGGACATCCAGATGACCCAATCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATACTGCATCCACTTTGCAAAGTGGGNTCCCATTAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGANNTATGCTANTCCTANNACGTTCGGNCNANGGGACCNNNGNNNNAAATCANNCGGGCGGCCGCACNNCATNATNNNNNATNCNCGNNNNCG CAGAACAAAACTCM33F AA sequence: (SEQ ID NO: 14)MKYLLPTAAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSAITNDGAGTTYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKSYTGFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYTASTLQSGXPLRFSGSGSGTDFTLTISSLQPEDFATYYCQQXYAXPXTF Clone M34C: (SEQ ID NO: 15)CTANGCGNCCNNTTNAGATCCTCTTCTGAGANGAGTTTTTGTTCTGCGGCCCCGTGATGGTGATGATGATGTGCGGCCGCCCGTTTGATTTCCACCTTGGTCCCTTGGCCGAACGTCGCAGGAGTCTGATGAGTCTGTTGACAGTAGTAAGTTGCAAAATCTTCAGGTTGCAGACTGCTGATGGTGAGAGTGAAATCTGTCCCAGATCCACTGCCACTGAACCTTGATGGGACCCCACTTTGCAACTGGGATGCCGGATAGATCAGGAGCTTAGGGGCTTTCCCTGGTTTCTGCTGATACCAATTTAAATAGCTGCTAATGCTCTGACTTGCCCGGCAAGTGATGGTGACTCTGTCTCCTACAGATGCAGACAGGGAGGATGGAGACTGGGTCATCTGGATGTCCGTCGACCCGCCACCGCCGCTGCCACCTCCGCCTGAACCGCCTCCACCGCTCGAGACGGTGACCAGGGTTCCCTGGCCCCAGTAGTCAAAAGACCAAAACTGTTTCGCACAGTAATATACGGCCGTGTCCTCGGCTCTCAGGCTGTTCATTTGCAGATACAGCGTGTTCTTGGAATTGTCTCTGGAGATGGTGAACCGGCCCTTCACGGAGTCTGCGTACGTTGTCGGCGGACCCTGCTTCGCAATATCTGAGACCCACTCCAGCCCCTTCCCTGGAGCCTGGCGGACCCAGCTCATGGCATAGCTGCTAAAGGTGAATCCAGAGGCTGCACAGGAGAGTCTCANGGACCCCCCAGGCTGTACCAAGCCTCCCCCAGACTCCAACAGCTGCACCTCGGCCATGGCCGGCTGGGCCGCGAGTAATAACAATCCAGCGGCTGCCGTANGCAATANGTATTTCATTATGACTGTCTCCTTGAAATAGAATTTGCATGCAAGCTTGGNNTANNATGGNCATAGCTGTTTNCTGTGTGAAATNGNTATNCNNTCNCAA TTCCNCACAANATACM34C AA sequence: (SEQ ID NO: 16)MKYXLXTAAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSXRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSDIAKQGPPTTYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKQFWSFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYPASQLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQTHQTPATFGQGTKVEIKRAAAHHHHHHGAAEQKLXSEED Clone M34F:(SEQ ID NO: 17) CATTCNGATCCTCTTCTGAGANGAGTTTTTGTTCTGCGGCCCCGTGATGGTGATGATGATGTGCGGCCGCCCGTTTGATTTCCACCTTGGTCCCTTGGCCGAACGTAATAGGAGACGGATGCGACTGTTGACAGTAGTAAGTTGCAAAATCTTCAGGTTGCAGACTGCTGATGGTGAGAGTGAAATCTGTCCCAGATCCACTGCCACTGAACCTTGATGGGACCCCACTTTGCAAATTGGATGCCCTATAGATCAGGAGCTTAGGGGCTTTCCCTGGTTTCTGCTGATACCAATTTAAATAGCTGCTAATGCTCTGACTTGCCCGGCAAGTGATGGTGACTCTGTCTCCTACAGATGCAGACAGGGAGGATGGAGACTGGGTCATCTGGATGTCCGTCGACCCGCCACCGCCGCTGCCACCTCCGCCTGAACCGCCTCCACCGCTCGAGACGGTGACCAGGGTTCCCTGGCCCCAGTAGTCAAACGCCGTCCAACGTTTCGCACAGTAATATACGGCCGTGTCCTCGGCTCTCAGGCTGTTCATTTGCAGATACAGCGTGTTCTTGGAATTGTCTCTGGAGATGGTGAACCGGCCCTTCACGGAGTCTGCGTAAATTGTCGGACTACCACCCCCAGCAATCGATGAGACCCACTCCAGCCCCTTCCCTGGAGCCTGGCGGACCCAGCTCATGGCATAGCTGCTAAAGGTGAATCCAGAGGCTGCACAGGAGAGTCTCANGGACCCCCCAGGCTGTACCAAGCCTCCCCCAGACTCCAACAGCTGCACCTCGGCCATGGCCGGCTGGGCCGCGAGTAATAACAATCCAGCGGCTGCCGTANGCAATAGGTATTTCATTATGACTGTCTCCTTGAAATAGANTTTGCATGCAAGCTTGGCGTAANTCATGGNCATAGCTGTTTCCTGTGTGAAATTGTTATCCNCTCACAANTTCCNCNCAANCATACGAANCCCGGAANGC M34F AA sequence: (SEQ ID NO: 18)MXMXYAKLACKXYFKETVIMKYLLXTAAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSXRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSSIAGGGSPTIYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKRWTAFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYRASNLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQSHPSPITFGQGTKVEIKRAAAHHHHHHGAAEQKLXSEED Clone M34G: (SEQ ID NO: 19)CTATGCGNNNNATTCAGATCCTCTTCTGAGATGAGTTTTTGTTCTGCGGCCCCGTGATGGTGATGATGATGTGCGGCCGCCCGTTTGATTTCCACCTTGGTCCCTTGGCCGAACGTAGGAGGCGAAGTCTGAACCTGTTGACAGTAGTAAGTTGCAAAATCTTCAGGTTGCAGACTGCTGATGGTGAGAGTGAAATCTGTCCCAGATCCACTGCCACTGAACCTTGATGGGACCCCACTTTGCAACAGGGATGCACGATAGATCAGGAGCTTAGGGGCTTTCCCTGGTTTCTGCTGATACCAATTTAAATAGCTGCTAATGCTCTGGCTTGCCCGGCAAGTGATGGTGACTCTGTCTCCTACAGATGCAGACAGGGAGGATGGAGACTGGGTCATCTGGATGTCCGTCGACCCGCCACCGCCGCTGCCACCTCCGCCTGAACCGCCTCCACCGCTCGAGACGGTGACCAGGGTTCCCTGGCCCCAGTAGTCAAACTGCTTACCACGTTTCGCACAGTAATATACGGCCGTGTCCTCGGCTCTCAGGCTGTTCATTTGCAGATACAGCGTGTTCTTGGAATTGTCTCTGGAGATGGTGAACCGGCCCTTCACGGAGTCTGCGTAATGTGTCACAGTACCATCCGGCCAAATACCTGAGACCCACTCCAGCCCCTTCCCTGGAGCCTGGCGGACCCAGCTCATGGCATAGCTGCTAAAGGTGAATCCAGAGGCTGCACAGGAGAGTCTCAGGGACCCCCCAGGCTGTACCAAGCCTCCCCCAGACTCCAACAGCTGCACCTCGGCCATGGCCGGCTGGGCCGCGAGTAATAACAATCCAGCGGCTGCCGTANGCAATAGGTATTTCATTATGACTGTCTCCTTGAAATAGAATTTGCATGCAAGCTTGGCGTANTCATGGTCATAGCTGTTTCCTGTGNGAAATTGTTATCCGCTCACNNTTCCACNCAACATACGANCCGG M34G AA sequence: (SEQ ID NO: 20)MKYLLXTAAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSGIWPDGTVTHYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKRGKQFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYRASLLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQVQTSPPTFGQGTKVEIKRAAAHHHHHHGAAEQKLISEEDLNX XHRClone M35A: (SEQ ID NO: 21)CTANGCGNNNNNNTCAGATCCTCTTCTGAGATGAGTTTTTGTTCTGCGGCCCCGTGATGGTGATGATGATGTGCGGCCGCCCGTTTGATTTCCACCTTGGTCCCTTGGCCGAACGTAGAAGGATTATCATCATTCTGTTGACAGTAGTAAGTTGCAAAATCTTCAGGTTGCAGACTGCTGATGGTGAGAGTGAAATCTGTCCCAGATCCACTGCCACTGAACCTTGATGGGACCCCACTTTGCAAAGTGGATGCATCATAAATCAGGAGCTTAGGGGCTTTCCCTGGTTTCTGCTGATACCAATTTAAATAGCTGCTAATGCTCTGACTTGCCCGGCAAGTGATGGTGACTCTGTCTCCTACAGATGCAGACAGGGAGGATGGAGACTGGGTCATCTGGATGTCCGTCGACCCGCCACCGCCGCTGCCACCTCCGCCTGAACCGCCTCCACCGCTCGAGACGGTGACCAGGGTTCCCTGGCCCCAGTAGTCAAAACCATTAGAAGTTTTCGCACAGTAATATACGGCCGTGTCCTCGGCTCTCAGGCTGTTCATTTGCAGATACAGCGTGTTCTTGGAATTGTCTCTGGAGATGGTGAACCGGCCCTTCACGGAGTCTGCGTAATATGTAGTACTACCAGTAGCATCAATAGTTGAGACCCACTCCAGCCCCTTCCCTGGAGCCTGGCGGACCCAGCTCATGGCATAGCTGCTAAAGGTGAATCCAGAGGCTGCACAGGAGAGTCTCAGGGACCCCCCAGGCTGTACCAAGCCTCCCCCAGACTCCAACAGCTGCACCTCGGCCATGGCCGGCTGGGCCGCGAGTAATAACAATCCAGCGGCTGCCGTNNNAATANGTATTTCATTATGACTGTCTCCTTGAAATAGAATTTGCATGCAAGCTNGGNNTAATCATGGTCATAGCTGTTTCCTGTGTGAAATTGTTATCCGCTCACAATTCCACACAACATACG M35A AA sequence: (SEQ ID NO: 22)MQILFQGDSHNEIXIXTAAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSTIDATGSTTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKTSNGFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYDASTLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQNDDNPSTFGQGTKVEIKRAAAHHHHHHGAAEQK LISEEDLClone M35F: (SEQ ID NO: 23)TTCAGATCCTCTTCTGAGANGAGTTTTTGTTCTGCGGCCCCGTGATGGTGATGANGATGTGCGGCCGCCCGTTTGATTTCCACCTTGGTCCCTTGGCCGAACGTAGTAGGACTAGCATAACTCTGTTGACAGTAGTAAGTTGCAAAATCTTCAGGTTGCAGACCGCTGATGGTGAGAGTGAAATCTGTCCCAGATCCACTGCCACTGAACCTTGATGGGACCCCACTTTGCAAAGAGGATGCACCATAGATCAGGAGCTTAGGGGCTTTCCCTGGTTTCTGCTGATACCAATTTAAATAGCTGCTAATGCTCTGACTTGCCCGGCAAGTGATGGTGACTCTGTCTCCTACAGATGCAGACAGGGAGGATGGAGACTGGGTCATCTGGATGTCCGTCGACCCGCCACCGCCGCTGCCACCTCCGCCTGAACCGCCTCCACCGCTCGAGACGGTGACCAGGGTTCCCTGGCCCCAGTAGTCAAAAGCAGTAGCAGTTTTCGCACAGTAATATACGGCCGTGTCCTCGGCTCTCAGGCTGTTCATTTGCAGATACAGCGTGTTCTTGGAATTGTCTCTGGAGATGGTGAACCGGCCCTTCACGGAGTCTGCGTAACTTGTAGCATCACCATTAGAATAAATAGATGAGACCCACTCCAGCCCCTTCCCTGGAGCCTGGCGGACCCAGCTCATGGCATAGCTGCTAAAGGTGAATCCAGAGGCTGCACAGGAGAGTCTCAGGGACCCCCCAGGCTGTACCAAGCCTCCCCCAGACTCCAACAGCTGCACCTCGGCCATGGCCGGCTGGGCCGCGAGTAATAACAATCCAGCGGCTGCCGTNNCAATAGGTATTTCATTATGACTGTCTCCTTGAAATANAATTTGCATGCAAGCTTGGNGTAATCATGGNCATAGCTGTTTCCTGNGTGAAATTGTTATCCGCTCACNATTCCNCACNACAT AM35F AA sequence: (SEQ ID NO: 24)MQIXFQGDSHNEIPIXTAAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSSIYSNGDATSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKTATAFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYGASSLQSGVPSRFSGSGSGTDFTLTISGLQPEDFATYYCQQSYASPTTFGQGTKVEIKRAAAHXHHHHGAAEQKL XSEEDLKClone M35G: (SEQ ID NO: 25)CTATGCGNCCCCATTCAGATCCTCTTCTGAGANGAGTTTTTGTTCTGCGGCCCCGTGATGGTGATGATGATGTGCGGCCGCCCGTTTGATTTCCACCTTGGTCCCTTGGCCGAACGTAGGAGGCGAAGTCTGAACCTGTTGACAGTAGTAAGTTGCAAAATCTTCAGGTTGCAGACTGCTGATGGTGAGAGTGAAATCTGTCCCAGATCCACTGCCACTGAACCTTGATGGGACCCCACTTTGCAACAGGGATGCACGATAGATCAGGAGCTTAGGGGCTTTCCCTGGTTTCTGCTGATACCAATTTAAATAGCTGCTAATGCTCTGGCTTGCCCGGCAAGTGATGGTGACTCTGTCTCCTACAGATGCAGACAGGGAGGATGGAGACTGGGTCATCTGGATGTCCGTCGACCCGCCACCGCCGCTGCCACCTCCGCCTGAACCGCCTCCACCGCTCGAGACGGTGACCAGGGTTCCCTGGCCCCAGTAGTCAAACTGCTTACCACGTTTCGCACAGTAATATACGGCCGTGTCCTCGGCTCTCAGGCTGTTCATTTGCAGATACAGCGTGTTCTTGGAATTGTCTCTGGAGATGGTGAACCGGCCCTTCACGGAGTCTGCGTAATGTGTCACAGTACCATCCGGCCAAATACCTGAGACCCACTCCAGCCCCTTCCCTGGAGCCTGGCGGACCCAGCTCATGGCATAGCTGCTAAAGGTGAATCCAGAGGCTGCACAGGAGAGTCTCAGGGACCCCCCAGGCTGTACCAAGCCTCCCCCAGACTCCAACAGCTGCACCTCGGCCATGGCCGGCTGGGCCGCGAGTAATAACAATCCAGCGGCTGCCGTANGCAATAGGTATTTCATTATGACTGTCTCCTTGAAATAGAATTTGCATGCAAGCTTGGCGTAANCATGGTCATAGCTGTTTCCTGTGNGAAATTGTTATCCNGCTCAC AATTCCNNCACAAM35G AA sequence: (SEQ ID NO: 26)MKYLLXTAAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSGIWPDGTVTHYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKRGKQFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYRASLLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQVQTSPPTFGQGTKVEIKRAAAHHHHHHGAAEQKLXSEEDLNG XAClone M58A: (SEQ ID NO: 27)TATGCGNNNATTCNGATCCTCTTCTGAGANGAGTTTTTGTTCTGCGGCCCCGTGATGGTGATGATGNNNTGCGGCCGCCCGTTTGATTTCCACCTTGGTCCCTTGGCCGAACGTATTAGGACAATCAGTAGTCTGTTGACAGTAGTAAGTTGCAAAATCTTCAGGTTGCAGACTGCTGATGGTGAGAGTGAAATCTGTCCCAGATCCACTGCCACTGAACCTTGATGGGACCCCACTTTGCAAAGTGGATGCATTATAGATCAGGAGCTTAGGGGCTTTCCCTGGTTTCTGCTGATACCAATTTAAATAGCTGCTAATGCTCTGACTTGCCCGGCAAGTGATGGTGACTCTGTCTCCTACAGATGCAGACAGGGAGGATGGAGACTGGGTCATCTGGATGTCCGTCGACCCGCCACCGCCGCTGCCACCTCCGCCTGAACCGCCTCCACCGCTCGAGACGGTGACCAGGGTTCCCTGGCCCCAGTAGTCAAAATTAGCACCAGATTTCGCACAGTAATATACGGCCGTGTCCTCGGCTCTCAGGCTGTTCATTTGCAGATACAGCGTGTTCTTGGAATTGTCTCTGGAGATGGTGAACCTGCCCTTCACGGAGTCTGCGTAAGATGTAGCATAACCACTAGCAGTAATACCTGAGACCCACTCCAGCCCCTTCCCTGGAGCCTGGCGGACCCAGCTCATGGCATAGCTGCTAAAGGTGAATCCAGAGGCTGCACAGGAGAGTCTCANGGACCCCCCAGGCTGTACCAAGCCTCCCCCAGACTCCAACAGCTGCACCTCGGCCATGGCCGGCTGGGCCGCGAGTAATAACAATCCAGCGGCTGCCGTANGCAATANGTATTTCATTATGACTGTCTCCTTGAAATAGAANTTTGCATGCAAGCTTGGNNTAATCATGGNNATAGCTGTTTCCTGTGTGAAATTGTTATCCGCTCACAAT TNCNCACM58A AA sequence: (SEQ ID NO: 28)MIXPSLHAXFYFKETVIMKYXLXTAAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSXRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSGITASGYATSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKSGANFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYNASTLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQTTDCPNTFGQGTKVEIKRAAAXHHHHHGAAEQKLXSEEDXNXRI Clone M58C: (SEQ ID NO: 29)GCGGCNNNTTCNGANCCTCTTCTGAGANGAGTTTTTGTTCTGCGGCCCCGTGNNGGTGATGNNNNNGTGCGGCCGCCCGTTTGATTTCCACCTTGGTCCCTTGGCCGAACGTATTAGGGGTACTGTAACTCTGTTGACAGTAGTAAGTTGCAAAATCTTCAGGTTGCAGACTGCTGATGGTGAGAGTGAAATCTGTCCCAGATCCACTGCCACTGAACCTTGATGGGACCCCACTTTGCAAACTGGATGCAGCATAGATCAGGAGCTTAGGGGCTTTCCCTGGTTTCTGCTGATACCAATTTAAATAGCTGCTAATGCTCTGACTTGCCCGGCAAGTGATGGTGACTCTGTCTCCTACAGATGCAGACAGGGAGGATGGAGACTGGGTCATCTGGATGTCCGTCGACCCGCCACCGCCGCTGCCACCTCCGCCTGAACCGCCTCCACCGCTCGAGACGGTGACCAGGGTTCCCTGGCCCCAGTAGTCAAACGCCGGATGATATTTCGCACAGTAATATACGGCCGTGTCCTCGGCTCTCAGGCTGTTCATTTGCAGATACAGCGTGTTCTTGGAATTGTCTCTGGAGATGGTGAACCGGCCCTTCACGGNGTCTGCGTACTCTGTCGGCAGACCCTGCGGCGCAATCGATGAGACCCACTCCAGCCCCTTCCCTGGAGCCTGGCGGACCCAGCTCATGGCATAGCTGCTAAAGGTGAATCCAGAGGCTGCACAGGAGAGTCTCAGGGACCCCCCAGGCTGTACCAAGCCTCCCCCAGACTCCAACAGCTGCACCTCGGCCATGGCCGGCTGGGCCGCGAGTAATAACAATCCAGCGGCNGNCGTANNCAATAGGTATTTCATTATGACTGTCTCCTTGAAATANNATTTGCATGCAAGCTTGGNGTANTCATGGNCATAGCTGTTTNCTGNGTGNAAATTGTTATCCGCTCNNNAAT TTCCACM58C AA sequence: (SEQ ID NO: 30)MKYLLXTXAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSSIAPQGLPTEYADXVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKYHPAFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYAASSLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQSYSTPNTFGQGTKVEIKRAAAXXHHXHGAAEQKLXSEED Clone M59F:(SEQ ID NO: 31) GCGNCCNNTTCAGATCCTCTTCTGAGATGAGTTTTTGTTCTGCGGCCCCGTGATGGTGATGANNNNNTGCGGCCGCCCGTTTGATTTCCACCTTGGTCCCTTGGCCGAACGTAGAAGGAGAATTACCAGTCTGTTGACAGTAGTAAGTTGCAAAATCTTCAGGTTGCAGACTGCTGATGGTGAGAGTGAAATCTGTCCCAGATCCACTGCCACTGAACCTTGATGGGACCCCACTTTGCAAAGCGGATGCAGTATAGATCAGGAGCTTAGGGGCTTTCCCTGGTTTCTGCTGATACCAATTTAAATAGCTGCTAATGCTCTGACTTGCCCGGCAAGTGATGGTGACTCTGTCTCCTACAGATGCAGACAGGGAGGATGGAGACTGGGTCATCTGGATGTCCGTCGACCCGCCACCGCCGCTGCCACCTCCGCCTGAACCGCCTCCACCGCTCGAGACGGTGACCAGGGTTCCCTGGCCCCAGTAGTCAAAAGTACTATAAGATTTCGCACAGTAATATACGGCCGTGTCCTCGGCTCTCAGGCTGTTCATTTGCAGATACAGCGTGTTCTTGGAATTGTCTCTGGAGATGGTGAACCGGCCCTTCACGGAGTCTGCGTAAGCTGTACTAGCACTACTAGCAGCAATACCTGAGACCCACTCCAGCCCCTTCCCTGGAGCCTGGCGGANCCAGCTCATGGCATAGCTGCTAAAGGTGAATCCAGAGGCTGCACAGGAGAGTCTCAGGGACCCCCCAGGCTGTACCAAGCCTCCCCCGGACTCCAACAGCTGCACCTCGGCCATGGCCGGCTGGGCCGCGAGTAATAACAATCCAGCGGCTGCCGTANGCAATANGTATTTCATTATGACTGTCTCCTTGAAATAGAATTTGCATGCAAGCTTGGCGTANTCATGGNCATAGCTGNTTCCTGTGTGAAATTGNTNATCCGCTCAC M59F AA sequence:(SEQ ID NO: 32) MKYXLXTAAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWXRQAPGKGLEWVSGIAASSASTAYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKSYSTFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYTASALQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQTGNSPSTFGQGTKVEIKRAAAXXHHHHGAAEQKLISEEDL Clone 4E1:(SEQ ID NO: 33) ATGGCCGAGGTGCAGCTGTCGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTTAGCAGCTATGCCATGAGCTGGGTCCGCCAGGCTCCAGGGAAGGGGCTGGAGTGGGTCTCAGGTATTAATAGTAATGGTACTTCTACATCTTACGCAGACTCCGTGAAGGGCCGGTTCACCATCTCCAGAGACAATTCCAAGAACACGCTGTATCTGCAAATGAACAGCCTGAGAGCCGAGGACACGGCCGTATATTACTGTGCGAAATCTGCTTCTGATTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCGAGCGGTGGAGGCGGTTCAGGCGGAGGTGGCAGCGGCGGTGGCGGGTCGACGGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATAATGCATCCACTTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGAATACTTATAGTCCTACTACGTTC 4E1 AA sequence: (SEQ ID NO: 34)MKYLLPTNAAGLLLLAANPAMAEVQLSESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSGINSNGTSTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKSASDFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYNASTLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQNTYSPTTFGNNNKVEIKRAA Clone 4H3: (SEQ ID NO: 35)ATGGCCGAGATGCAGCTGTTGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTTAGCAGCTATGCCATGAGCTGGGTCCGCCAGGCTCCAGGGAAGGGGCTGGAGTGGGTCTCATATATTACTGCTAATGGTGATAGTACAACTTACGCAGACTCCGTGAAGGGCCGGTTCACCATCTCCAGAGACAATTCCAAGAACACGCTGTATCTGCAAATGAACAGCCTGAGAGCCGAGGACACGGCCGTATATTACTGTGCGAAAAGTACTACTGATTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCGAGCGGTGGAGGCGGTTCAGGCGGAGGTGGCAGCGGCGGTGGCGGGTCGACGGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATAGTGCATCCAATTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGACTTCTTATAGTCCTTCTACGTTCGGCCAAGGGNCCAAGGTGGAAATCAAACGG GCGGCC4H3 AA Sequence: (SEQ ID NO: 36)MAEMQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSYITANGDSTTYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKSTTDFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYSASNLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQTSYSPSTFGQG?KVEIKRAAA Clone 1A5: (SEQ ID NO: 37)ATGGCCGAGGTGCAGCTGTTGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGNTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTTAGCAGCTATGCCATGAGCTGGGTCCGCCAGGCTCCAGGGAAGGGGCTGGAGTGGGTCTCAACTATTAATGCTAGTGGTGGTAGTACAGGTTACGCAGACTCCGTGAAGGGCCGGTTCACCATCTCCAGAGACAATTCCAAGAACACGCTGTATCTGCAAATGAACAGCCTGAGAGCCGAGGACACGGCCGTATATTACTGTGCGAAAGCTGATGCTTATTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCGAGCGGTGGAGGCGGTTCAGGCGGAGGTGGCAGCGGCGGTGGCGGGTCGACGGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATTCTGCATCCTCGTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGGATGCTAGTGGTCCTTCTACGTTCGGCCAAGGGACCAAGGTGGAAATCAAACGGGC GGCCGCA1A5 AA Sequence: (SEQ ID NO: 38)MAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSTINASGGSTGYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKADAYFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYSASSLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQDASGPSTFGQGTKVEIKRAA Clone 3D3: (SEQ ID NO: 39)ATGGCCGAGGTGCAGCTGTTGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTTAGCAGCTATGCCATGAGCTGGGTCCGCCAGGCTCCAGGGAAGGGGCTGGAGTGGGTCTCATATATTGCTGATGATGGTGCTAATACAGCTTACGCAGACTCCGTGAAGGGCCGGTTCACCATCTCCAGAGACAATTCCAAGAACACGCTGTATCTGCAAATGAACAGCCTGAGAGCCGAGGACACGGCCGTATATTACTGTGCGAAAAATAATGATGGTTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCGAGCGGTGGAGGCGGTTCAGGCGGAGGTGGCAGCGGCGGTGGCGGGTCGACGAACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATTCTGCATCCACTTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGGCTGCTACTAGTCCTTCTACGTTCGGCCAAGGGNCCAAGGTGGAAATCAAACGG GCGGNCGCAC3D3 AA Sequence: (SEQ ID NO: 40)MAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSYIADDGANTAYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKNNDGFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTNIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYSASTLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQAATSPSTFGQG?KVEIKRA?A

The following TBI Clone Sequences were identified:

Clone T2B: (SEQ ID NO: 41)TTCAAGGAGACAGTCATAATGAAATANCCTATTGCNTACGGCANNCGCTGGATTGTTATTACTCGCGGCCCAGCCNGNCCATGGCCGAGGTGCAGCTGTTGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTTAGCAGCTATGCCATGAGCTGGGTCCGCCAGGCTCCAGGGAAGGGGCTGGAGTGGGTCTCAAATATTAGTTCTGATGGTGATTCTACAGCTTACGCAGACTCCGTGAAGGGCCGGTTCACCATCTCCAGAGACAATTCCAAGAACACGCTGTATCTGCAAATGAACAGCCTGAGAGCCGAGGACACGGCCGTATATTACTGTGCGAAAGCTTCTAGTAATTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCGAGCGGTGGAGGCGGTTCAGGCGGAGGTGGCAGCGGCGGTGGCGGGTCGACGGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATGCTGCATCCAATTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGTCTAATTCTGATCCTACTACGTTCGGCCAAGGGACCAAGGTAATCAAACGGGCGGCCGCACATCATCATCACCATCACGGGGCCGCAGAACAAAAACTCNTCTCAGAAGAGGATCTGAATGGNNCCGCATAGNC T2B AA sequence:(SEQ ID NO: 42) MAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVRQAPGKGLEWVSNISSDGDSTAYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKASSNFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYAASNLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQSNSDPTTFGQGTKVIKRAAAHHHHHHGAAEQKLXSEEDLNXXA Clone T1H: (SEQ ID NO: 43)CAGGGGGGGCGGNGCCTATGNAAAAAACGCCAGCAACGCGGCCTTTTACGGTTCCTGGCCCTTTGCTGGCCTTTTGCTCACATGTTCTTTCCTGCGTTATCCCCTGATTCTGTGGATAACCGTATTACCGCCTTTGAGTGAGCTGATACCGCTCGCCGCAGCCGAACGACCGAGCGCAGCGAGTCAGTGAGCGAGGAAGCGGAAGAGCGCCCAATACGCAAACCGCCTCTCCCCGCGCGTTGGCCGATTCATTAATGCAGCTGGCACGACAGGTTTCCCGACTGGAAAGCGGGCAGTGAGCGCAACGCAATTAATGTGAGTTAGCTCACTCATTAGGCACCCCAGGCTTTACACTTTATGCTCCCGGCTCGTATGTTGTGTGGAATTGTGAGCGGATAACAATTTCACACAGGAAACAGCTATGACCATGATTACGCCAAGCTTGCATGCAAATTCTATTTCAAGGAGACAGTCATAGCTAGCATGAAAAAGATTTGGCTGGCGCTGGCTGGTTTAGTTTTAGCGTTTAGCGCATCGGCGGACTACAAAGAGGCCCAGCCGGCCATGGACCTGGGTAAGAAACTGCTGGAAGCTGCTCGTGCTGGTCAGGACGACGAAGTTCGTATCCTGATGGCTAACGGTGCTGACGTTAACGCTCATGACGAACAGGGTACTACTCCGCTGCACCTGGCTGCTAAAGAAGGTCACCTGGAAATCGTTGAAGTTCTGCTGAAGTACGGTGCTGACGTTAACGCTCAGGACAAATTCGGTAAGACCGCTTTCGACATCTCCATCGACAACGGTAACGAGGACCTGGCTGAAATCCTGCAAGCGGCCGCACATCATCATCACCATCACGGGGCCGCAGAACAAAAACTCATCTCAGAAGAGGATCTG AATGGCCGCNTAT1H AA sequence: (SEQ ID NO: 44)MLPARMLCGIVSGQFHTGNSYDHDYAKLACKFYFKETVIASMKKIWLALAGLVLAFSASADYKEAQPAMDLGKKLLEAARAGQDDEVRILMANGADVNAHDEQGTTPLHLAAKEGHLEIVEVLLKYGADVNAQDKFGKTAFDISIDNGNEDLAEILQAAAHHHHHHGAAEQKLISEEDLNGRX Clone T3F: (SEQ ID NO: 45)GAGCTATGAGANNNNNNCCACGCTTCCCCNAAGGGAGAAAGGCGGACAGGTATCCCGGTAAGCNGGCAGGGTCGGAACAGGAGAGCGCACGAGGGAGNNTNCAGGGGGAAACGCCTGGTATCTTTATAGTCCTGTCGGNNTTTCGCCACCTCTGACTTGAGCGTCGATTTTTTGTGATGCTCGTCAGGGGGGCGGAGCCTATGGAAAAACGCCAGCAACGCGGCCTTTTTACGGTTCCTGGCCTTTTGCTGGCCTTTTGCTCACATGTTCTTTCCTGCGTTATCCCCTGATTCTGTGGATAACCGTATTACCGCCTTTGAGTGAGCTGATACCGCTCGCCGCAGCCGAACGACCGAGCGCAGCGAGTCAGTGAGCGAGGAAGCGGAAGAGCGCCCAATACGCAAACCGCCTCTCCCCGCGCGTTGGCCGATTCATTAATGCAGCTGGCACGACAGGTTTCCCGACTGGAAAGCGGGCAGTGAGCGCAACGCAATTAATGTGAGTTAGCTCACTCATTAGGCACCCCAGGCTTTACACTTTATGCTCCCGGCTCGTATGTTGTGTGGAATTGTGAGCGGATAACAATTTCACACAGGAAACAGCTATGACCATGATTACGCCAAGCTTGCATGCAAATTCTATTTCAAGGAGACAGTCATAGCTAGCATGAAAAAGATTTGGCTGGCGCTGGCTGGTTTAGTTTTAGCGTTTAGCGCATCGGCGGACTACAAAGAGGCCCAGCCGGCCATGGTAGGAAGACCTGACGTTAACGCTCAGGACAAATTCGGTAAGACCGCTTTCGACATCTCCATCGACAACGGTAACGAGGACCTGGCTGAAATCCTGCAAGCGGCCGCACatCaTCATCACCATCACGGGGCCGCAGAACAAAAACTCNTCTCAGAAGAGGATCNGAANNNNNCGCNTAGA T3F AA sequence: (SEQ ID NO: 46)MFFPALSPDSVDNRITAFEADTARRSRTTERSESVSEEAEERPIRKPPLPARWPIHCSWHDRFPDWKAGSERNAINVSLTHAPQALHEMLPARMLCGIVSGQFHTGNSYDHDYAKLACKFYFKETVIASMKKIWLALAGLVLAFSASADYKEAQPAMVGRPDVNAQDKFGKTAFDISIDNGNEDLAEILQAAAHHHHHHGAAEQKLXSEED Clone T3G: (SEQ ID NO: 47)TCGTCAGGGGGGNCGGNAGCCTATGGAAAAAACGNNAGCAACGNGNCNTTTTTACGGNNNNTGGCCTTTTGCTGGCNTTTGCTCACATGTTCTTTCCTGCGTTNNCCCCTGATTCTGTGGATANCCGTATTACCGCCTTTNGAGTGAGCTGATACCGNTCGCCGCAGCCGAACGACCGAGCGCAGCGAGTCAGTGAGCGAGGAAGCGGAAGAGCGCCCAATACGCAAACCGCCTCTCCCCGCGCGTTGGCCGATTCATTAATGCAGCTGGCACGACAGGTTTCCCGACTGGAAAGCGGGCAGTGAGCGCAACGCAATTAATGTGAGTTAGCTCACTCATTAGGCACCCCAGGCTTTACACTTTATGCTCCCGGCTCGTATGTTGTGTGGAATTGTGAGCGGATAACAATTTCACACAGGAAACAGCTATGACCATGATTACGCCAAGCTTGCATGCAAATTCTATTTCAAGGAGACAGTCATAGCTAGCATGAAAAAGATTTGGCTGGCGCTGGCTGGTTTAGTTTTAGCGTTTAGCGCATCGGCGGACTACAAAGAGGCCCAGCCGGCCATGGACCTGGGTAAGAAACTGCTGGAAGCTGCTCGTGCTGGTCAGGACGACGAAGTTCGTATCCTGATGGCTAACGGTGCTGACGTTAACGCTTGGGACATGACTGGTCATACTCCGCTGCACCTGGCTGCTCAGTTCGGTCACCTGGAAATCGTTGAAGTTCTGCTGAAGCACGGTGCTGACGTTAACGCTCAGGACAAATTCGGTAAGACCGCTTTCGACATCTCCATCGACAACGGTAACGAGGACCTGGCTGAAATCCTGCAAGCGGCCGCACatcatCATCACCATCACGGGGcCGCAGAACAAAAAcTCaTcTCAGAAGAGGATNNGAANGNNNCCGCA T3G AA sequence: (SEQ ID NO: 48)MLPARMLCGIVSGQFHTGNSYDHDYAKLACKFYFKETVIASMKKIWLALAGLVLAFSASADYKEAQPAMDLGKKLLEAARAGQDDEVRILMANGADVNAWDMTGHTPLHLAAQFGHLEIVEVLLKHGADVNAQDKFGKTAFDISIDNGNEDLAEILQAAAHHHHHHG AAEQKLISEEDClone T1A: (SEQ ID NO: 49)TTTATAGTNCNTGTCGGGTTTCNCCACNTNTGACNTGAGCNTCGATNTTTNNNNTGCTCNNCAGGGGGGCGGAGCCTATGGAAAAACGNCAGCAACGCGNCNTTTNTNCGGTTNNTGNCNTTTTGCTGGCCTTTTGCTCACATGTTCTTTCNTGCGTTATCCCNTGATTNTGTGGATANCCGTATTACCGCCTTTGAGTGAGCTGATACCGCTCGCCGCANNCGAACGACCGAGCGCAGNGAGTCAGTGAGCGAGGAAGCGGAAGAGCGCCCAATACGCAAACCGCCTCTCNCCGCGCGTTGGCCGATTCATTAATGCAGCTGGCACGACAGGTTTNNNGACTGGAAAGCGGGCAGTGAGCGCAACGCAATTAATGTGAGTTAGCTCACTCATTAGGCACCCCAGGCTTTACACTTTATGCTCCCGGCTCGTATGTTGTGTGGAATTGTGAGCGGATAACAATTTCACACAGGAAACAGNTATGACCATGATTACGCCAAGCTTGCATGCAAATTCTATTTCAAGGAGACAGTCATAGCTAGCATGAAAAAGATTTGGCTGGCGCTGGCTGGTTTAGTTTTAGCGTTTAGCGCATCGGCGGANTACAAAGAGGCCCAGCCGGCCATGGGCGGAACCAGCAGTTTNTTACCCAGGTCCATGGACCTGGGTCACCTGGAAATCGTTGAAGTTCTGCTGAAGTACGGTGNTGACGTTAACGNTCAGGACAAATTCGGTAAGACCGCTTTCGACATNTCCATCGACAACGGTAACGAGGACCTGGCTGAAATCCTGCAAGCGGCCGCACATCATCATCACCATCATCGGGCTCGCAGAACAAAA ATCATCTCT1A AA sequence: (SEQ ID NO: 50)MFFXALSXDXVDXRITAFEADTARRXRTTERXESVSEEAEERPIRKPPLXARWPIHCSWHDRFXDWKAGSERNAINVSLTHAPQALHFMLPARMLCGIVSGQFHTGNXYDHDYAKLACKFYFKETVIASMKKIWLALAGLVLAFSASAXYKEAQPAMGGTSSXLPRSMDLGHLEIVEVLLKYGXDVNXQDKFGKTAFDXSIDNGNEDLAEILQAAAHHHHHHRARRT KII Clone T1D:(SEQ ID NO: 51) GAGCCTATGGAAAAAACGCCCAGCAACGCGGCNTTTTTACGGTTCCTGGCCTTTTGCTNGNCNTTTTGNTCACATGTTCTTTCCTGCGTTATCCCCTGATTCTGTGGATAACCGTATTACCGCCTTTGAGTGNNNNGATACCGCTCGCCGCAGCCGAACGACCGAGCGCAGCGAGTCAGTGAGCGAGGAAGCGGAAGAGCGCCCAATACGCAAACCGCCTCTCCCCGCGCGTTGGCCGATTCATTAATGCAGCTGGCACGACAGGTTTCCCGACTGGAAAGCGGGCAGTGAGCGCAACGCAATTAATGTGAGTTAGCTCACTCATTAGGCACCCCAGGCTTTACACTTTATGCTCCCGGCTCGTATGTTGTGTGGAATTGTGAGCGGATAACAATTTCACACAGGAAACAGCTATGACCATGATTACGCCAAGCTTGCATGCAAATTCTATTTCAAGGAGACAGTCATAGCTAGCATGAAAAAGATTTGGCTGGCGCTGGCTGGTTTAGTTTTAGCGTTTAGCGCATCGGCGGACTACAAAGAGGCCCAGCCGGCCATGGACCTGGGTAAGAAACTGCTGGAAGCTGCTCGTGCTGGTCAGGACGACGAAGTTCGTATCCTGATGGCTAACGGTGCTGACGTTAACGCTGACGACTTCTCTGGTACTACTCCGCTGCACCTGGCTGCTCATCATGGTCACCTGGAAATCGTTGAAGTTCTGCTGAAGTACGGTGCTGACGTTAACGCTCAGGACAAATTCGGTAAGACCGCTTTCGACATCTCCATCGACAACGGTAACGAGGACCTGGCTGAAATCCTGCAAGCGGCCGCANNNNNNCATCACCATCACGGGGCCGCAGAACAAAAACTCNNNCAGAAGAGGATNNGAANNNNCG CATAT1D AA sequence: (SEQ ID NO: 52)MFFPALSPDSVDNRITAFEXXDTARRSRTTERSESVSEEAEERPIRKPPLPARWPIHCSWHDRFPDWKAGSERNAINVSLTHAPQALHFMLPARMLCGIVSGQFHTGNSYDHDYAKLACKFYFKETVIASMKKIWLALAGLVLAFSASADYKEAQPAMDLGKKLLEAARAGQDDEVRILMANGADVNADDFSGTTPLHLAAHHGHLEIVEVLLKYGADVNAQDKFGKTAFDISIDNGNEDLAEILQAAAXXHHHHGAAEQKLX Clone T2C: (SEQ ID NO: 53)GANGNTCNNCAGGGGGGGCGGAGCCTATNGAAAAAACGCCAGCAACGCGGCNTTTTTTACGGTTCCTGGCCTTTTGCTGGCCTTTTGCTCACATGTTCTTTCCTGCGTTATCCCCTGATTCTGTGGATANCCGTATTACCGCCTTTGAGTGAGCTGATACCGCTCGCCGCAGCCGAACGACCGAGCGCAGCGAGTCAGTGAGCGAGGAAGCGGAAGAGCGCCCAATACGCAAACCGCCTCTCCCCGCGCGTTGGCCGATTCATTAATGCAGCTGGCACGACAGGTTTCCCGACTGGAAAGCGGGCAGTGAGCGCAACGCAATTAATGTGAGTTAGCTCACTCATTAGGCACCCCAGGCTTTACACTTTATGCTCCCGGCTCGTATGTTGTGTGGAATTGTGAGCGGATAACAATTTCACACAGGAAACAGCTATGACCATGATTACGCCAAGCTTGCATGCAAATTCTATTTCAAGGAGACAGTCATAGCTAGCATGAAAAAGATTTGGCTGGCGCTGGCTGGTTTAGTTTTAGCGTTTAGCGCATCGGCGGACTACAAAGAGGCCCAGCCGGCCATGGACCTGGGTAAGAAACTGCTGGAAGCTGCTCGTGCTGGTCAGGACGACGAAGTTCGTATCCTGATGGCTAACGGTGCTGACGTTAACGCTCTGGACGAAGTTGGTTCTACTCCGCTGCACCTGGCTGCTATGGCTGGTCACCTGGAAATCGTTGAAGTGCTGAAGCACGGTGCTGACGTTAACGCTCAGGACAAATTCGGTAAGACCGCTTTCGACATCTCCATCGACAACGGTAACGAGGACCTGGCTGAAATCCTGCAAGCGGCCGCACATCATCATCACCATCACGGGGCCGCAGAACAAAAACTCATCTCAGAAGAGGATCTGAATGNNNCGCNTAG T2C AA sequence: (SEQ ID NO: 54)MLPARMLCGIVSGQFHTGNSYDHDYAKLACKFYFKETVIASMKKIWLALAGLVLAFSASADYKEAQPAMDLGKKLLEAARAGQDDEVRILMANGADVNALDEVGSTPLHLAAMAGHLEIVEVLKHGADVNAQDKFGKTAFDISIDNGNEDLAEILQAAAHHHHHHGA AEQKLISEEDClone T2F: (SEQ ID NO: 55)GGACAGGNTATCCGGTAAAGCGGCAGGGTCGGANCANNAGAGCGCACGAGGGAGCTTNNCAGGGGGAAACGCCTGGTATCTTTATAGTCCTGTCGGNTTTCGCCCACCTCTGACTTGAGCGTCGATTTTTGTGATGCTCGTCAGGGGGGGCGGAGCCTATGGAAAAACGCCAGCAACGCGGCCTTTTTACGGTTCCTGGCCTTTTGCTGGCCTTTTGCTCACATGTTCTTTCCTGCGTTATCCCCTGATTCTGTGGATAACCGTATTACCGCCTTTGAGTGAGCTGATACCGCTCGCCGCAGCCGAACGACCGAGCGCAGCGAGTCAGTGAGCGAGGAAGCGGAAGAGCGCCCAATACGCAAACCGCCTCTCCCCGCGCGTTGGCCGATTCATTAATGCAGCTGGCACGACAGGTTTCCCGACTGGAAAGCGGGCAGTGAGCGCAACGCAATTAATGTGAGTTAGCTCACTCATTAGGCACCCCAGGCTTTACACTTTATGCTCCCGGCTCGTATGTTGTGTGGAATTGTGAGCGGATAACAATTTCACACAGGAAACAGCTATGACCATGATTACGCCAAGCTTGCATGCAAATTCTATTTCAAGGAGACAGTCATAGCTAGCATGAAAAAGATTTGGCTGGCGCTGGCTGGTTTAGTTTTAGCGTTTAGCGCATCGGCGGACTACAAAGAGGCCCAGCCGGCCATGGACCTGGCTGCTCATGTTGGTCACCTGGAAATCGTTGAAGTTCTGCTGAAGTACGGTGCTGACGTTAACGCTCAGGACAAATTCGGTAAGACCGCTTTCGACATCTCCATCGACAACGGTAACGAGGACCTGGCTGAAATCCTGCAAGCGGCcgCACatCaTCATCACCATCACGGGGCCGCAGAACAAAAACTCaTCTCAGAAGAGGATCTGANNNNNCGCNTAG T2F AA sequence: (SEQ ID NO: 56)MFFPALSPDSVDNRITAFEADTARRSRTTERSESVSEEAEERPIRKPPLPARWPIHCSWHDRFPDWKAGSERNAINVSLTHAPQALHFMLPARMLCGIVSGQFHTGNSYDHDYAKLACKFYFKETVIASMKKIWLALAGLVLAFSASADYKEAQPAMDLAAHVGHLEIVEVLLKYGADVNAQDKFGKTAFDISIDNGNEDLAEILQAAAHHHHHHGAAEQKLISEEDL

A “variant” of an amino acid sequence described herein, or a nucleicacid sequence encoding such an amino acid sequence, is a sequence thatis substantially similar to SEQ ID NO:1-56. Variant amino acid andnucleic acid sequences include synthetically derived amino acid andnucleic acid sequences, or recombinantly derived amino acid or nucleicacid sequences. Generally, amino acid or nucleic acid sequence variantsof the invention will have at least 40, 50, 60, to 70%, e.g., 71%, 72%,73%, 74%, 75%, 76%, 77%, 78%, to 79%, generally at least 80%, e.g.,81%-84%, at least 85%, e.g., 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%,94%, 95%, 96%, 97%, to 98%, sequence identity to SEQ ID NO: 1-56. Thepresent invention includes variants of the amino acid sequences of theantibodies and antibody fragments described herein, as well as variantsof the nucleic acid sequences encoding such amino acid sequences (i.e.,SEQ ID NO:1, SEQ ID NO:2, SEQ ID NO:3, SEQ ID NO:4, SEQ ID NO:5, SEQ IDNO:6, SEQ ID NO:7, SEQ ID NO:8, SEQ ID NO:9, SEQ ID NO:10, SEQ ID NO:11,SEQ ID NO:12, SEQ ID NO:13, SEQ ID NO:14, SEQ ID NO:15, SEQ ID NO:16,SEQ ID NO:17, SEQ ID NO:18, SEQ ID NO:19, SEQ ID NO:20, SEQ ID NO:21,SEQ ID NO:22, SEQ ID NO:23, SEQ ID NO:24, SEQ ID NO:25, SEQ ID NO:26,SEQ ID NO:27, SEQ ID NO:28, SEQ ID NO:29, SEQ ID NO:30, SEQ ID NO:31,SEQ ID NO:32, SEQ ID NO:33, SEQ ID NO:34, SEQ ID NO:35, SEQ ID NO:36,SEQ ID NO:37, SEQ ID NO:38, SEQ ID NO:39, SEQ ID NO:40, SEQ ID NO:41,SEQ ID NO:42, SEQ ID NO:43, SEQ ID NO:44, SEQ ID NO:45, SEQ ID NO:46,SEQ ID NO:47, SEQ ID NO:48, SEQ ID NO:49, SEQ ID NO:50, SEQ ID NO:51,SEQ ID NO:52, SEQ ID NO:53, SEQ ID NO:54, SEQ ID NO:55 or SEQ ID NO:56).

“Variants” are intended to include sequences derived by deletion(so-called truncation) or addition of one or more amino acids to theN-terminal and/or C-terminal end, and/or addition of one or more basesto the 5′ or 3′ end of the nucleic acid sequence; deletion or additionof one or more amino acids/nucleic acids at one or more sites in thesequence; or substitution of one or more amino acids/nucleic acids atone or more sites in the sequence. The amino acids described herein maybe altered in various ways including amino acid substitutions,deletions, truncations, and insertions. Methods for such manipulationsare generally known in the art. For example, amino acid sequencevariants can be prepared by mutations in the DNA. Methods formutagenesis and nucleotide sequence alterations are well known in theart. The substitution may be a conserved substitution. A “conservedsubstitution” is a substitution of an amino acid with another amino acidhaving a similar side chain. A conserved substitution would be asubstitution with an amino acid that makes the smallest change possiblein the charge of the amino acid or size of the side chain of the aminoacid (alternatively, in the size, charge or kind of chemical groupwithin the side chain) such that the overall protein retains its spatialconformation but does not alter its biological activity. For example,common conserved changes might be Asp to Glu, Asn or Gln; His to Lys,Arg or Phe; Asn to Gln, Asp or Glu and Ser to Cys, Thr or Gly. Alanineis commonly used to substitute for other amino acids. The 20 essentialamino acids can be grouped as follows: alanine, valine, leucine,isoleucine, proline, phenylalanine, tryptophan and methionine havingnonpolar side chains; glycine, serine, threonine, cystine, tyrosine,asparagine and glutamine having uncharged polar side chains; aspartateand glutamate having acidic side chains; and lysine, arginine, andhistidine having basic side chains.

As used herein, “sequence identity” or “identity” in the context of twonucleic acid or polypeptide sequences makes reference to a specifiedpercentage of residues in the two sequences that are the same whenaligned for maximum correspondence over a specified comparison window,as measured by sequence comparison algorithms or by visual inspection.When percentage of sequence identity is used in reference to proteins itis recognized that residue positions which are not identical oftendiffer by conservative amino acid substitutions, where amino acidresidues are substituted for other amino acid residues with similarchemical properties (e.g., charge or hydrophobicity) and therefore donot change the functional properties of the molecule. When sequencesdiffer in conservative substitutions, the percent sequence identity maybe adjusted upwards to correct for the conservative nature of thesubstitution. Sequences that differ by such conservative substitutionsare said to have “sequence similarity” or “similarity.” Means for makingthis adjustment are well known to those of skill in the art. Typicallythis involves scoring a conservative substitution as a partial ratherthan a full mismatch, thereby increasing the percentage sequenceidentity. Thus, for example, where an identical amino acid is given ascore of 1 and a non-conservative substitution is given a score of zero,a conservative substitution is given a score between zero and 1. Thescoring of conservative substitutions is calculated, e.g., asimplemented in the program PC/GENE (Intelligenetics, Mountain View,Calif.).

Nucleic Acids and Vectors

In certain embodiments, the present invention provides a nucleic acidencoding the amino acids described herein.

In certain embodiments, the present invention provides a vectorcomprising the nucleic acid described herein.

In certain embodiments, the present invention provides a phagecomprising the vector described herein.

As used herein, the term “nucleic acid” and “polynucleotide” refers todeoxyribonucleotides or ribonucleotides and polymers thereof in eithersingle- or double-stranded form, composed of monomers (nucleotides)containing a sugar, phosphate and a base that is either a purine orpyrimidine. Unless specifically limited, the term encompasses nucleicacids containing known analogs of natural nucleotides which have similarbinding properties as the reference nucleic acid and are metabolized ina manner similar to naturally occurring nucleotides. Unless otherwiseindicated, a particular nucleic acid sequence also implicitlyencompasses conservatively modified variants thereof (e.g., degeneratecodon substitutions) and complementary sequences as well as the sequenceexplicitly indicated. Specifically, degenerate codon substitutions maybe achieved by generating sequences in which the third position of oneor more selected (or all) codons is substituted with mixed-base and/ordeoxyinosine residues.

A “nucleic acid fragment” is a portion of a given nucleic acid molecule.Deoxyribonucleic acid (DNA) in the majority of organisms is the geneticmaterial while ribonucleic acid (RNA) is involved in the transfer ofinformation contained within DNA into proteins. The term “nucleotidesequence” refers to a polymer of DNA or RNA which can be single- ordouble-stranded, optionally containing synthetic, non-natural or alterednucleotide bases capable of incorporation into DNA or RNA polymers.

The terms “nucleic acid,” “nucleic acid molecule,” “nucleic acidfragment,” “nucleic acid sequence or segment,” or “polynucleotide” mayalso be used interchangeably with gene, cDNA, DNA and RNA encoded by agene, e.g., genomic DNA, and even synthetic DNA sequences. The term alsoincludes sequences that include any of the known base analogs of DNA andRNA.

By “fragment” or “portion” is meant a full length or less than fulllength of the nucleotide sequence.

A “variant” of a molecule is a sequence that is substantially similar tothe sequence of the native molecule. For nucleotide sequences, variantsinclude those sequences that, because of the degeneracy of the geneticcode, encode the identical amino acid sequence of the native protein.Naturally occurring allelic variants such as these can be identifiedwith the use of well-known molecular biology techniques, as, forexample, with polymerase chain reaction (PCR) and hybridizationtechniques. Variant nucleotide sequences also include syntheticallyderived nucleotide sequences, such as those generated, for example, byusing site-directed mutagenesis that encode the native protein, as wellas those that encode a polypeptide having amino acid substitutions.Generally, nucleotide sequence variants of the invention will have in atleast one embodiment 40%, 50%, 60%, to 70%, e.g., 71%, 72%, 73%, 74%,75%, 76%, 77%, 78%, to 79%, generally at least 80%, e.g., 81%-84%, atleast 85%, e.g., 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%,97%, to 98%, sequence identity to the native (endogenous) nucleotidesequence.

As used herein, “sequence identity” or “identity” in the context of twonucleic acid sequences makes reference to a specified percentage ofresidues in the two sequences that are the same when aligned by sequencecomparison algorithms or by visual inspection.

As used herein, “percentage of sequence identity” means the valuedetermined by comparing two optimally aligned sequences, wherein theportion of the polynucleotide sequence may comprise additions ordeletions (i.e., gaps) as compared to the reference sequence (which doesnot comprise additions or deletions) for optimal alignment of the twosequences. The percentage is calculated by determining the number ofpositions at which the identical nucleic acid base occurs in bothsequences to yield the number of matched positions, dividing the numberof matched positions by the total number of positions in the window ofcomparison, and multiplying the result by 100 to yield the percentage ofsequence identity.

The term “substantial identity” of polynucleotide sequences means that apolynucleotide comprises a sequence that has at least 70%, 71%, 72%,73%, 74%, 75%, 76%, 77%, 78%, or 79%; at least 80%, 81%, 82%, 83%, 84%,85%, 86%, 87%, 88%, or 89%; at least 90%, 91%, 92%, 93%, or 94%; or evenat least 95%, 96%, 97%, 98%, or 99% sequence identity, compared to areference sequence using one of the alignment programs described usingstandard parameters.

Another indication that nucleotide sequences are substantially identicalis if two molecules hybridize to each other under stringent conditions(see below). Generally, stringent conditions are selected to be about 5°C. lower than the thermal melting point (T_(m)) for the specificsequence at a defined ionic strength and pH. However, stringentconditions encompass temperatures in the range of about 1° C. to about20° C., depending upon the desired degree of stringency as otherwisequalified herein. Nucleic acids that do not hybridize to each otherunder stringent conditions are still substantially identical if thepolypeptides they encode are substantially identical. This may occur,e.g., when a copy of a nucleic acid is created using the maximum codondegeneracy permitted by the genetic code.

As noted above, another indication that two nucleic acid sequences aresubstantially identical is that the two molecules hybridize to eachother under stringent conditions. The phrase “hybridizing preferentiallyto” refers to the binding, duplexing, or hybridizing of a molecule onlyto a particular nucleotide sequence under stringent conditions when thatsequence is present in a complex mixture (e.g., total cellular) DNA orRNA. “Bind(s) substantially” refers to complementary hybridizationbetween a probe nucleic acid and a target nucleic acid and embracesminor mismatches that can be accommodated by reducing the stringency ofthe hybridization media to achieve the desired detection of the targetnucleic acid sequence.

“Stringent hybridization conditions” and “stringent hybridization washconditions” in the context of nucleic acid hybridization experimentssuch as Southern and Northern hybridizations are sequence dependent, andare different under different environmental parameters. Longer sequenceshybridize specifically at higher temperatures. The T_(m) is thetemperature (under defined ionic strength and pH) at which 50% of thetarget sequence hybridizes to a perfectly matched nucleic acid.Specificity is typically the function of post-hybridization washes, thecritical factors being the ionic strength and temperature of the finalwash solution. For DNA-DNA hybrids, the T_(m) can be approximated fromthe equation of Meinkoth and Wahl: T_(m) 81.5° C.+16.6 (log M)+0.41 (%GC)−0.61 (% form)−500/L. M is the molarity of monovalent cations, % GCis the percentage of guanosine and cytosine nucleotides in the DNA, %form is the percentage of formamide in the hybridization solution, and Lis the length of the hybrid in base pairs. T_(m) is reduced by about 1°C. for each 1% of mismatching; thus, T_(m), hybridization, and/or washconditions can be adjusted to hybridize to sequences of the desiredidentity. For example, if sequences with >90% identity are sought, theT_(m) can be decreased 10° C. Generally, stringent conditions areselected to be about 5° C. lower than the thermal melting point (T_(m))for the specific sequence and its complement at a defined ionic strengthand pH. However, severely stringent conditions can utilize ahybridization and/or wash at 1, 2, 3, or 4° C. lower than the thermalmelting point (T_(m)); moderately stringent conditions can utilize ahybridization and/or wash at 6, 7, 8, 9, or 10° C. lower than thethermal melting point (T_(m)); low stringency conditions can utilize ahybridization and/or wash at 11, 12, 13, 14, 15, or 20° C. lower thanthe thermal melting point (T_(m)). Using the equation, hybridization andwash compositions, and desired T, those of ordinary skill willunderstand that variations in the stringency of hybridization and/orwash solutions are inherently described. If the desired degree ofmismatching results in a T of less than 45° C. (aqueous solution) or 32°C. (formamide solution), it is preferred to increase the SSCconcentration so that a higher temperature can be used. Generally,highly stringent hybridization and wash conditions are selected to beabout 5° C. lower than the thermal melting point (T_(m)) for thespecific sequence at a defined ionic strength and pH.

An example of highly stringent wash conditions is 0.15 M NaCl at 72° C.for about 15 minutes. An example of stringent wash conditions is a0.2×SSC wash at 65° C. for 15 minutes. Often, a high stringency wash ispreceded by a low stringency wash to remove background probe signal. Anexample medium stringency wash for a duplex of, e.g., more than 100nucleotides, is 1×SSC at 45° C. for 15 minutes. An example lowstringency wash for a duplex of, e.g., more than 100 nucleotides, is4-6×SSC at 40° C. for 15 minutes. For short probes (e.g., about 10 to 50nucleotides), stringent conditions typically involve salt concentrationsof less than about 1.5 M, more preferably about 0.01 to 1.0 M, Na ionconcentration (or other salts) at pH 7.0 to 8.3, and the temperature istypically at least about 30° C. and at least about 60° C. for longprobes (e.g., >50 nucleotides). Stringent conditions may also beachieved with the addition of destabilizing agents such as formamide. Ingeneral, a signal to noise ratio of 2× (or higher) than that observedfor an unrelated probe in the particular hybridization assay indicatesdetection of a specific hybridization.

Very stringent conditions are selected to be equal to the T_(m) for aparticular probe. An example of stringent conditions for hybridizationof complementary nucleic acids which have more than 100 complementaryresidues on a filter in a Southern or Northern blot is 50% formamide,e.g., hybridization in 50% formamide, 1 M NaCl, 1% SDS at 37° C., and awash in 0.1×SSC at 60 to 65° C. Exemplary low stringency conditionsinclude hybridization with a buffer solution of 30 to 35% formamide, 1MNaCl, 1% SDS (sodium dodecyl sulphate) at 37° C., and a wash in 1× to2×SSC (20×SSC=3.0 M NaCl/0.3 M trisodium citrate) at 50 to 55° C.Exemplary moderate stringency conditions include hybridization in 40 to45% formamide, 1.0 M NaCl, 1% SDS at 37° C., and a wash in 0.5× to 1×SSCat 55 to 60° C.

“Operably-linked” nucleic acids refers to the association of nucleicacid sequences on single nucleic acid fragment so that the function ofone is affected by the other, e.g., an arrangement of elements whereinthe components so described are configured so as to perform their usualfunction. For example, a regulatory DNA sequence is said to be “operablylinked to” or “associated with” a DNA sequence that codes for an RNA ora polypeptide if the two sequences are situated such that the regulatoryDNA sequence affects expression of the coding DNA sequence (i.e., thatthe coding sequence or functional RNA is under the transcriptionalcontrol of the promoter). Coding sequences can be operably-linked toregulatory sequences in sense or antisense orientation. Control elementsoperably linked to a coding sequence are capable of effecting theexpression of the coding sequence. The control elements need not becontiguous with the coding sequence, so long as they function to directthe expression thereof. Thus, for example, intervening untranslated yettranscribed sequences can be present between a promoter and the codingsequence and the promoter can still be considered “operably linked” tothe coding sequence.

The terms “isolated and/or purified” refer to in vitro isolation of anucleic acid, e.g., a DNA or RNA molecule from its natural cellularenvironment, and from association with other components of the cell ortest solution (e.g. RNA pool), such as nucleic acid or polypeptide, sothat it can be sequenced, replicated, and/or expressed. For example,“isolated nucleic acid” may be a DNA molecule containing less than 31sequential nucleotides that is transcribed into an RNAi molecule. Suchan isolated RNAi molecule may, for example, form a hairpin structurewith a duplex 21 base pairs in length that is complementary orhybridizes to a sequence in a gene of interest, and remains stably boundunder stringent conditions (as defined by methods well known in the art,e.g., in Sambrook and Russell, 2001). Thus, the RNA or DNA is “isolated”in that it is free from at least one contaminating nucleic acid withwhich it is normally associated in the natural source of the RNA or DNAand is preferably substantially free of any other mammalian RNA or DNA.The phrase “free from at least one contaminating source nucleic acidwith which it is normally associated” includes the case where thenucleic acid is reintroduced into the source or natural cell but is in adifferent chromosomal location or is otherwise flanked by nucleic acidsequences not normally found in the source cell, e.g., in a vector orplasmid.

Nucleic acid molecules having base substitutions (i.e., variants) areprepared by a variety of methods known in the art. These methodsinclude, but are not limited to, isolation from a natural source (in thecase of naturally occurring sequence variants) or preparation byoligonucleotide-mediated (or site-directed) mutagenesis, PCRmutagenesis, and cassette mutagenesis of an earlier prepared variant ora non-variant version of the nucleic acid molecule.

“Operably-linked” refers to the association of nucleic acid sequences onsingle nucleic acid fragment so that the function of one of thesequences is affected by another. For example, a regulatory DNA sequenceis said to be “operably linked to” or “associated with” a DNA sequencethat codes for an RNA or a polypeptide if the two sequences are situatedsuch that the regulatory DNA sequence affects expression of the codingDNA sequence (i.e., that the coding sequence or functional RNA is underthe transcriptional control of the promoter). Coding sequences can beoperably-linked to regulatory sequences in sense or antisenseorientation.

As used herein, the term “derived” or “directed to” with respect to anucleotide molecule means that the molecule has complementary sequenceidentity to a particular molecule of interest.

In certain embodiments, the expression cassette further contains apromoter. In certain embodiments, the promoter is a regulatablepromoter. In certain embodiments, the promoter is a constitutivepromoter. In certain embodiments, the promoter is a PGK, CMV or RSVpromoter.

The present invention provides a vector containing the expressioncassette described above. Expression vectors include, but are notlimited to, viruses, plasmids, and other vehicles for deliveringheterologous genetic material to cells. Accordingly, the term“expression vector” as used herein refers to a vehicle for deliveringheterologous genetic material to a cell. In particular, the expressionvector is a recombinant adenoviral, adeno-associated virus, orlentivirus or retrovirus vector. In certain embodiments, the viralvector is an adenoviral, lentiviral, adeno-associated viral (AAV),poliovirus, HSV, or murine Maloney-based viral vector.

“Expression cassette” as used herein means a nucleic acid sequencecapable of directing expression of a particular nucleotide sequence inan appropriate host cell, which may include a promoter operably linkedto the nucleotide sequence of interest that may be operably linked totermination signals. It also may include sequences required for propertranslation of the nucleotide sequence. The coding region usually codesfor a protein of interest. The expression cassette including thenucleotide sequence of interest may be chimeric. The expression cassettemay also be one that is naturally occurring but has been obtained in arecombinant form useful for heterologous expression. The expression ofthe nucleotide sequence in the expression cassette may be under thecontrol of a constitutive promoter or of a regulatable promoter thatinitiates transcription only when the host cell is exposed to someparticular stimulus. In the case of a multicellular organism, thepromoter can also be specific to a particular tissue or organ or stageof development.

Binding Molecules

As used herein, the term “binding molecule” includes antibodies, whichincludes scFvs (also called a “nanobodies”), humanized, fully human orchimeric antibodies, single-chain antibodies, diabodies, andantigen-binding fragments of antibodies (e.g., Fab fragments).

In certain embodiments, the binding molecule does not contain theconstant domain region of an antibody.

In certain embodiments, the binding molecule is less than 500 aminoacids in length, such as between 200-450 amino acids in length, or lessthan 400 amino acids in length.

In certain embodiments, the binding molecule preferentially recognizes aparticular stage of human AD Tau (e.g., AD Braak Stage I, compared toother AD stages).

In certain embodiments, the binding molecule preferentially recognizestau associated with TBI.

In certain embodiments, the binding molecule binds to AD Tau. In certainembodiments, the binding molecule comprises an amino acid sequence ofSEQ ID NO: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32,34, 36, 38, or 40. In certain embodiments, the binding moleculecomprises an amino acid sequence encoded by a nucleic acid, wherein thenucleic acid has at least 80% identity to SEQ ID NO:1, 3, 5, 7, 9, 11,13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, or 39.

In certain embodiments, the binding molecule binds to TBI Tau. Incertain embodiments, the binding molecule comprises an amino acidsequence of SEQ ID NO: 42, 44, 46, or 48, 50, 52, 54, 56. In certainembodiments, the binding molecule comprises an amino acid sequenceencoded by a nucleic acid, wherein the nucleic acid has at least 80%identity to SEQ ID NO:41, 43, 45, or 47, 49, 51, 53, 55.

Detection Reagents and Assays

For purposes of the diagnostic methods of the invention, thecompositions or ligand of the invention (e.g., binding molecule such asan antibody or antibody fragment) may be conjugated to a detectingreagent that facilitates detection of the ligand. For example, example,the detecting reagent may be a direct label or an indirect label. Thelabels can be directly attached to or incorporated into the detectionreagent by chemical or recombinant methods.

In one embodiment, a label is coupled to the ligand through a chemicallinker. Linker domains are typically polypeptide sequences, such as polygly sequences of between about 5 and 200 amino acids. In someembodiments, proline residues are incorporated into the linker toprevent the formation of significant secondary structural elements bythe linker. In certain embodiments, linkers are flexible amino acidsubsequences that are synthesized as part of a recombinant fusionprotein comprising the RNA recognition domain. In one embodiment, theflexible linker is an amino acid subsequence that includes a proline,such as Gly(x)-Pro-Gly(x) where x is a number between about 3 and about100. In other embodiments, a chemical linker is used to connectsynthetically or recombinantly produced recognition and labeling domainsubsequences. Such flexible linkers are known to persons of skill in theart. For example, poly(ethylene glycol) linkers are available fromShearwater Polymers, Inc. Huntsville, Ala. These linkers optionally haveamide linkages, sulfhydryl linkages, or heterofunctional linkages.

The detectable labels can be used in the assays of the present inventionto diagnose TBI, these labels are attached to the ligand of theinvention, can be primary labels (where the label comprises an elementthat is detected directly or that produces a directly detectableelement) or secondary labels (where the detected label binds to aprimary label, e.g., as is common in immunological labeling). Anintroduction to labels, labeling procedures and detection of labels isfound in Polak and Van Noorden (1997) Introduction toImmunocytochemistry, 2nd ed., Springer Verlag, N.Y. and in Haugland(1996) Handbook of Fluorescent Probes and Research Chemicals, a combinedhandbook and catalogue Published by Molecular Probes, Inc., Eugene,Oreg. Patents that described the use of such labels include U.S. Pat.Nos. 3,817,837; 3,850,752; 3,939,350; 3,996,345; 4,277,437; 4,275,149;and 4,366,241.

Primary and secondary labels can include undetected elements as well asdetected elements. Useful primary and secondary labels in the presentinvention can include spectral labels such as green fluorescent protein,fluorescent dyes (e.g., fluorescein and derivatives such as fluoresceinisothiocyanate (FITC) and Oregon Green™, rhodamine and derivatives(e.g., Texas red, tetrarhodimine isothiocynate (TRITC), etc.),digoxigenin, biotin, phycoerythrin, AMCA, CyDyes™, and the like),radiolabels (e.g., ³H, ¹²⁵I, ³⁵S, ¹⁴C, ³²P, ³³P, etc.), enzymes (e.g.,horse radish peroxidase, alkaline phosphatase etc.), spectralcalorimetric labels such as colloidal gold or colored glass or plastic(e.g. polystyrene, polypropylene, latex, etc.) beads. The label can becoupled directly or indirectly to a component of the detection assay(e.g., the detection reagent) according to methods well known in theart. As indicated above, a wide variety of labels may be used, with thechoice of label depending on sensitivity required, ease of conjugationwith the compound, stability requirements, available instrumentation,and disposal provisions.

Exemplary labels that can be used include those that use: 1)chemiluminescence (using horseradish peroxidase and/or alkalinephosphatase with substrates that produce photons as breakdown productsas described above) with kits being available, e.g., from MolecularProbes, Amersham, Boehringer-Mannheim, and Life Technologies/Gibco BRL;2) color production (using both horseradish peroxidase and/or alkalinephosphatase with substrates that produce a colored precipitate (kitsavailable from Life Technologies/Gibco BRL, and Boehringer-Mannheim));3) fluorescence using, e.g., an enzyme such as alkaline phosphatase,together with the substrate AttoPhos (Amersham) or other substrates thatproduce fluorescent products, 4) fluorescence (e.g., using Cy-5(Amersham), fluorescein, and other fluorescent tags); 5) radioactivity.Other methods for labeling and detection will be readily apparent to oneskilled in the art.

Where the ligand-based compositions of the invention are contemplated tobe used in a clinical setting, the labels are preferably non-radioactiveand readily detected without the necessity of sophisticatedinstrumentation. In certain embodiments, detection of the labels willyield a visible signal that is immediately discernable upon visualinspection. One example of detectable secondary labeling strategies usesan antibody that recognizes oligomers in which the antibody is linked toan enzyme (typically by recombinant or covalent chemical bonding). Theantibody is detected when the enzyme reacts with its substrate,producing a detectable product. In certain embodiments, enzymes that canbe conjugated to detection reagents of the invention include, e.g.,β-galactosidase, luciferase, horse radish peroxidase, and alkalinephosphatase. The chemiluminescent substrate for luciferase is luciferin.One embodiment of a fluorescent substrate for β-galactosidase is4-methylumbelliferyl-β-D-galactoside. Embodiments of alkalinephosphatase substrates include p-nitrophenyl phosphate (pNPP), which isdetected with a spectrophotometer; 5-bromo-4-chloro-3-indolylphosphate/nitro blue tetrazolium (BCIP/NBT) and fast red/napthol AS-TRphosphate, which are detected visually; and4-methoxy-4-(3-phosphonophenyl) spiro[1,2-dioxetane-3,2′-adamantane],which is detected with a luminometer. Embodiments of horse radishperoxidase substrates include 2,2′azino-bis(3-ethylbenzthiazoline-6sulfonic acid) (ABTS), 5-aminosalicylic acid (5AS), o-dianisidine, ando-phenylenediamine (OPD), which are detected with a spectrophotometer,and 3,3,5,5′-tetramethylbenzidine (TMB), 3,3′ diaminobenzidine (DAB),3-amino-9-ethylcarbazole (AEC), and 4-chloro-1-naphthol (4C1N), whichare detected visually. Other suitable substrates are known to thoseskilled in the art. The enzyme-substrate reaction and product detectionare performed according to standard procedures known to those skilled inthe art and kits for performing enzyme immunoassays are available asdescribed above.

The presence of a label can be detected by inspection, or a detectorwhich monitors a particular probe or probe combination is used to detectthe detection reagent label. Typical detectors includespectrophotometers, phototubes and photodiodes, microscopes,scintillation counters, cameras, film and the like, as well ascombinations thereof. Examples of suitable detectors are widelyavailable from a variety of commercial sources known to persons ofskill. Commonly, an optical image of a substrate comprising boundlabeling moieties is digitized for subsequent computer analysis.

The ligand compositions of the invention can be used in any diagnosticassay format to determine the presence of human CSF/brain-associated tauvariants. A variety of immunodetection methods are contemplated for thisembodiment. Such immunodetection methods include enzyme linkedimmunosorbent assay (ELISA), radioimmunoassay (RIA), immunoradiometricassay, fluoroimmunoassay, chemiluminescent assay, bioluminescent assay,and Western blot, though several others are well known to those ofordinary skill. The steps of various useful immunodetection methods havebeen described in the scientific literature.

In general, the binding methods include obtaining a sample suspected ofcontaining a protein, polypeptide and/or peptide (e.g., humanCSF/brain-associated Tau variants), and contacting the sample with afirst antibody, monoclonal or polyclonal, in accordance with the presentinvention, as the case may be, under conditions effective to allow theformation of complexes.

The binding methods include methods for detecting and quantifying theamount of the target oligomer component in a sample and the detectionand quantification of any complexes formed during the binding process.Here, one would obtain a sample suspected of containing targetoligomers, and contact the sample with an antibody fragment of theinvention, and then detect and quantify the amount of complexes formedunder the specific conditions.

Contacting the chosen biological sample with the antibody undereffective conditions and for a period of time sufficient to allow theformation of complexes (primary complexes) is generally a matter ofsimply adding the antibody composition to the sample and incubating themixture for a period of time long enough for the antibodies to formcomplexes with, i.e., to bind to, any antigens present. After this time,the sample-antibody composition, such as a tissue section, ELISA plate,dot blot or western blot, will generally be washed to remove anynon-preferentially bound antibody species, allowing only those scFvmolecules preferentially bound within the primary complexes to bedetected.

In general, the detection of immunocomplex formation is well known inthe art and may be achieved through the application of numerousapproaches. These methods are generally based upon the detection of alabel or marker, such as any of those radioactive, fluorescent,biological and enzymatic tags. U.S. patents concerning the use of suchlabels include U.S. Pat. Nos. 3,817,837; 3,850,752; 3,939,350;3,996,345; 4,277,437; 4,275,149 and 4,366,241, each incorporated hereinby reference. Of course, one may find additional advantages through theuse of a secondary binding ligand such as a second antibody and/or abiotin/avidin ligand binding arrangement, as is known in the art.

As noted above, a ligand of the invention may itself be linked to adetectable label, wherein one would then simply detect this label,thereby allowing the amount of the primary complexes in the compositionto be determined. Alternatively, a first antibody that becomes boundwithin the primary complexes may be detected by means of a secondbinding ligand that has binding affinity for the complex. In thesecases, the second binding ligand may be linked to a detectable label.The second binding ligand is itself often an antibody, which may thus betermed a “secondary” ligand. The primary complexes are contacted withthe labeled, secondary binding ligand or antibody under effectiveconditions and for a period of time sufficient to allow the formation ofsecondary complexes. The secondary complexes are then generally washedto remove any non-specifically bound labeled secondary antibodies orligands, and the remaining label in the secondary complexes is thendetected.

Further methods include the detection of primary complexes by a two-stepapproach. A second binding ligand, such as an antibody, that has bindingaffinity for the scFv is used to form secondary complexes, as describedabove. After washing, the secondary complexes are contacted with a thirdbinding ligand or antibody that has binding affinity for the secondantibody, again under effective conditions and for a period of timesufficient to allow the formation of complexes (tertiary complexes). Thethird ligand or antibody is linked to a detectable label, allowingdetection of the tertiary complexes thus formed. This system may providefor signal amplification if this is desired.

One method of immunodetection designed by Charles Cantor uses twodifferent antibodies. A first step biotinylated, monoclonal orpolyclonal antibody or antibody fragment (in the present example a scFv)is used to detect the target antigen(s), and a second step antibody isthen used to detect the biotin attached to the complex. In this methodthe sample to be tested is first incubated in a solution containing thefirst step ligand. If the target antigen is present, some of the ligandbinds to the antigen to form a biotinylated ligand/antigen complex. Theligand/antigen complex is then amplified by incubation in successivesolutions of streptavidin (or avidin), biotinylated DNA, and/orcomplementary biotinylated DNA, with each step adding additional biotinsites to the ligand/antigen complex. The amplification steps arerepeated until a suitable level of amplification is achieved, at whichpoint the sample is incubated in a solution containing the second stepantibody against biotin. This second step antibody is labeled, as forexample with an enzyme that can be used to detect the presence of theantibody/antigen complex by histoenzymology using a chromogen substrate.With suitable amplification, a conjugate can be produced which ismacroscopically visible.

Another known method of detection takes advantage of the immuno-PCR(Polymerase Chain Reaction) methodology. The PCR method is similar tothe Cantor method up to the incubation with biotinylated DNA, however,instead of using multiple rounds of streptavidin and biotinylated DNAincubation, the DNA/biotin/streptavidin/antibody complex is washed outwith a low pH or high salt buffer that releases the antibody. Theresulting wash solution is then used to carry out a PCR reaction withsuitable primers with appropriate controls. At least in theory, theenormous amplification capability and specificity of PCR can be utilizedto detect a single antigen molecule.

As detailed above, the assays in their most simple and/or direct senseare binding assays. Certain preferred assays are the various types ofenzyme linked immunosorbent assays (ELISAs) and/or radioimmunoassays(RIA) known in the art. Immunohistochemical detection using tissuesections is also particularly useful. However, it will be readilyappreciated that detection is not limited to such techniques, and/orwestern blotting, dot blotting, FACS analyses, and/or the like may alsobe used.

The diagnostic assay format that may be used in the present inventioncould take any conventional format such as ELISA or other platforms suchas luminex or biosensors. The present invention provides various ligands(e.g., scFv). These ligands can readily be modified to facilitatediagnostic assays, for example a tag (such as GFP) can be added to theseligands to increase sensitivity. In one exemplary ELISA, ligands (e.g.,scFvs) are immobilized onto a selected surface exhibiting proteinaffinity, such as a well in a polystyrene microtiter plate. Then, a testcomposition suspected of containing a target oligomer, such as aclinical sample (e.g., a biological sample obtained from the subject),is added to the wells. After binding and/or washing to removenon-specifically bound complexes, the bound antigen may be detected.Detection is generally achieved by the addition of an antibody that islinked to a detectable label. This type of ELISA is a simple “sandwichELISA.” Detection may also be achieved by the addition of a secondantibody, followed by the addition of a third antibody that has bindingaffinity for the second antibody, with the third antibody being linkedto a detectable label.

In another exemplary ELISA, the samples suspected of containing theantigen are immobilized onto the well surface and/or then contacted withbinding agents. After binding and/or washing to remove non-specificallybound complexes, the bound anti-binding agents are detected. Where theinitial binding agents are linked to a detectable label, the complexesmay be detected directly. Again, the complexes may be detected using asecond antibody that has binding affinity for the first binding agents,with the second antibody being linked to a detectable label.

Another ELISA in which the antigens are immobilized, involves the use ofantibody competition in the detection. In this ELISA, labeled antibodies(or nanobodies) against an antigen are added to the wells, allowed tobind, and/or detected by means of their label. The amount of an antigenin an unknown sample is then determined by mixing the sample with thelabeled antibodies against the antigen during incubation with coatedwells. The presence of an antigen in the sample acts to reduce theamount of antibody against the antigen available for binding to the welland thus reduces the ultimate signal. This is also appropriate fordetecting antibodies against an antigen in an unknown sample, where theunlabeled antibodies bind to the antigen-coated wells and also reducesthe amount of antigen available to bind the labeled antibodies.

Irrespective of the format employed, ELISAs have certain features incommon, such as coating, incubating and binding, washing to removenon-specifically bound species, and detecting the bound immunecomplexes.

In coating a plate with either target oligomers or a ligand (e.g.,antibody) of the invention, one will generally incubate the wells of theplate with a solution of the antigen or ligand, either overnight or fora specified period of hours. The wells of the plate will then be washedto remove incompletely adsorbed material. Any remaining availablesurfaces of the wells are then “coated” with a nonspecific protein thatis antigenically neutral with regard to the test antisera. These includebovine serum albumin (BSA), casein or solutions of milk powder. Thecoating allows for blocking of nonspecific adsorption sites on theimmobilizing surface and thus reduces the background caused bynonspecific binding of antisera onto the surface.

In ELISAs, it is probably more customary to use a secondary or tertiarydetection means rather than a direct procedure. Thus, after binding of aprotein or antibody to the well, coating with a non-reactive material toreduce background, and washing to remove unbound material, theimmobilizing surface is contacted with the biological sample to betested under conditions effective to allow immune complex(antigen/antibody) formation. Detection of the immune complex thenrequires a labeled secondary binding ligand or antibody, and a secondarybinding ligand or antibody in conjunction with a labeled tertiaryantibody or a third binding ligand.

“Under conditions effective to allow immune complex (antigen/antibody)formation” means that the conditions preferably include diluting the tauoligomers and/or scFv composition with solutions such as BSA, bovinegamma globulin (BGG) or phosphate buffered saline (PBS)/Tween. Theseadded agents also tend to assist in the reduction of nonspecificbackground.

The “suitable” conditions also mean that the incubation is at atemperature or for a period of time sufficient to allow effectivebinding. Incubation steps are typically from about 1 to 2 to 4 hours orso, at temperatures preferably on the order of 25° C. to 27° C., or maybe overnight at about 4° C. or so.

Following all incubation steps in an ELISA, the contacted surface iswashed so as to remove non-complexed material. An example of a washingprocedure includes washing with a solution such as PBS/Tween, or boratebuffer. Following the formation of specific immune complexes between thetest sample and the originally bound material, and subsequent washing,the occurrence of even minute amounts of immune complexes may bedetermined.

To provide a detecting means, the second or third antibody will have anassociated label to allow detection. This may be an enzyme that willgenerate color development upon incubating with an appropriatechromogenic substrate. Thus, for example, one will desire to contact orincubate the first and second immune complex with a urease, glucoseoxidase, alkaline phosphatase or hydrogen peroxidase-conjugated antibodyfor a period of time and under conditions that favor the development offurther immune complex formation (e.g., incubation for 2 hours at roomtemperature in a PBS-containing solution such as PBS-Tween).

After incubation with the labeled antibody, and subsequent to washing toremove unbound material, the amount of label is quantified, e.g., byincubation with a chromogenic substrate such as urea, or bromocresolpurple, or 2,2′-azino-di-(3-ethyl-benzthiazoline-6-sulfonic acid (ABTS),or H₂O₂, in the case of peroxidase as the enzyme label. Quantificationis then achieved by measuring the degree of color generated, e.g., usinga visible spectra spectrophotometer.

Diagnostic Methods

In certain embodiments, the present invention provides a method fordetermining risk of traumatic brain injury (TBI) and/or susceptibilityto neurodegenerative disease in a subject by measuring levels ofparticular tau oligomeric proteins preferentially associated withdifferent stages of AD or with TBI.

In certain embodiments, the present invention provides a method fordetermining risk of traumatic brain injury (TBI), assessment of theamount of neuronal damage, and/or susceptibility to neurodegenerativedisease in a subject, comprising the steps of:

(A) providing a sample obtained from a subject post-injury;

(B) assessing levels of TBI-associated tau in the sample;

(C) comparing the TBI-associated tau protein level in the sample withTBI-associated tau protein level in a normal control; and

(D) determining whether the subject has a risk of TBI in accordance withthe result of step (C);

wherein a subject having elevated TBI-associated tau protein has a highrisk of TBI.

In certain embodiments, the sample and the normal control are bloodproduct samples or cerebrospinal fluid (CSF) samples. In certainembodiments, the blood product is serum.

In certain embodiments, the detecting in step (B) is by means of aligand specific for the protein.

In certain embodiments, the ligand is an antibody.

In certain embodiments, the ligand is a scFv specific for TBI-associatedtau.

In certain embodiments, the protein levels are detected by means ofELISA.

The invention will now be illustrated by the following non-limitingExample.

Example 1 Isolation of Nanobodies Selective for Tau Species in TBI butNot ND CSF Samples

Morphology-specific nanobodies are used to identify the set of serumbiomarkers that are diagnostic for AD, and determine if these also showup in a subset of TBI patients. Soldiers suffering TBI who showreactivity similar to the AD biomarker set, have suffered damage similarto that shown in AD brain, and should be much more susceptible to AD.The goal is to rapidly and accurately detect and quantify a selected setof toxic protein variants of A13, tau and a-syn that are characteristicof AD.

Nanobodies specific to selected tau species unique to TBI were isolated.Tau is present in human tissue in a variety of different forms since itis generated through multiple splicing events and can have a variety ofdifferent post-translational modifications. Because of the diversity oftau species, there are selected species that are indicative ofparticular neuronal conditions such as AD or other tauopathies.Nanobodies were generated that selectively recognize tau species presentin TBI patients.

Immunoprecipitate Total Tau from Two Different Regions of Age MatchedPost-Mortem Human AD and Cognitively Normal Brain Tissue

Brain Tissue and CSF: AD and normal brain tissue samples were obtainedfrom Banner/Sun Health Brain Bank (BSHBB). Samples were obtained fromtwo different brain regions of AD cases confirmed to have abundanttangles, the superior frontal gyrus and middle temporal gyrus. Tendifferent AD and 10 different control patient samples were received fora total of 20 AD and 20 control samples. All subjects had a PMI lessthan 5 hours. Detailed clinical and neuropathological data wereavailable on these subjects, including MMSE, CERAD neuritic plaquedensity scores, Braak tangle stage and regionalLewy-typealpha-syncleinopathy density scores. Post-mortem samples werede-identified for all personal patient information. CSF from fourdifferent patients who had sustained head injury and control CSF from 15normal/healthy individuals were obtained from Banner Sun Health. Thesesamples were used to identify potential markers in traumatic braininjury compared to control.

Brain tissue lysis: Briefly, frozen samples were homogenized bysupersonication in cold lysis buffer: 25 mM HEPESNaOH (pH 7.9), 150 mMNaCl, 1.5 mM MgCl₂, 0.2 mM EDTA, 0.5% Triton-X-100, 1 mM dithiothreitol,proteaseinhibitor cocktail. The homogenized sample was centrifuged andthe supernatant was frozen in −80° C. The presence of fibrillar tau wasverified by immunohistochemistry using slices from one AD and one NDsample and staining with an antibody against phosphorylated tau. The ADsample showed significantly more tau tangle pathology than the controlsample (FIG. 1).

Immunoprecipitation of tau protein: Two polyclonal tau antibodypreparations were used to immunoprecipitate tau from the AD brainhomogenates, TBI CSF and corresponding controls: PA1 against amino-acids240-450 of tau and PAS against amino-acid 1-286 to cover all isoforms.Antibody conjugates were captured using the Pierce Crosslink IP Kit Afollowing the manufacturers' protocols. With the crosslink kit, theantibody first binds the protein A/G agarose and then is chemicallycrosslinked to the resin preventing the antibody from eluting off thecolumn. Tau was eluted from the column using a low pH elution buffer. Topreserve integrity of the tau aggregates, the elution buffer wasneutralized with 1M Tris, pH 9.5 as recommended by the manufacturer. Thebrain slices (FIG. 1) were analyzed and tau eluted from TBI CSF usingdot blots (FIG. 2), and tau eluted from the brain tissue by western blot(FIGS. 3a and 3b ).

Biopanning—AD tau specific morphologies: Aliquots of the Sheets,Tomlinson I and J and DARPin scFv libraries were grown and combined togenerate scFv library stock with titers of around 10e13. Negativepanning steps were performed to remove phage clones that bind tonon-target sticky protein samples including bovine serum album (FIG. 4).Several rounds of negative panning was performed against a-synucleinaggregates to remove all antibody fragments that bind generic forms ofaggregated protein morphologies. Additional negative panning stepsagainst monomeric tau, healthy tissue samples and healthy tau sampleswere performed to remove all antibody fragments that bind to genericforms of tau found in healthy individuals. Atomic force microscopy (AFM)imaging was performed after every negative panning step to ensureremoval of non-specific antibody fragments. Final positive selection wasperformed using for AD braak stage III and V specific tau variantmorphologies.

TBI tau specific morphologies: A clone that could bind to all forms oftau is essential and is used as a secondary detection reagent insandwich ELISA. Hence, phage obtained after negative panning witha-synuclein (FIG. 5) was used for positive panning against monomerictau. For panning against tau isolated from TBI, eight rounds of negativepanning against control CSF samples (10 μg/mL) were first performed.Cleaved mica surface was used to conserve sample. This step was used toremove all phage binding to proteins and other components present innormal CSF including any tau variants present in healthy individuals.Phage remaining after negative panning against BSA, α-synuclein andcontrol CSF was used to carry out positive panning with tauimmunoprecipitated from TBI CSF samples (FIGS. 6, 7). Positive bindingclones were eluted using either Trypsin or TEA and recovered byinfecting TG1 cells.

AD tau clones: After two rounds of positive panning with AD Braak stageIII, unbound phage clones were used for a positive round of selectionagainst AD Braak stage V and vice versa (FIG. 8). Each of the micas waseluted using trypin and TEA and grown on LB-Amp plates overnight at 37°C. About 60 clones were obtained before negative panning with AD Braakstage III and V. Typically 50-100 clones are obtained in this step andthe results obtained are encouraging. After further rounds of negativepanning with AD Braak stage V and III, 15 and 20 clones were obtainedagainst AD Braak stage III and Braak stage V respectively. The number ofclones after the final rounds of positive panning was as anticipated. Toensure these clones are capable of making full length antibody fragment,their sequences were checked for any mutations and stop codons. Phagewas produced for clone sequences free of any errors. Dotblots spottedwith human AD homogenized brain tissue and corresponding controls wereused to verify each of the phage clones.

TBI tau clone: Approximately 24 clones were recovered from the panningagainst tau variants present in the TBI CSF samples. Typically it isexpected to recover around 20-50 clones in the positive panning step sothis was an encouraging result. These clones were further sequenced tocheck for any stop codons or mutations. This step ensures that theseclones are capable of making full length antibody fragments. Severalclones isolated against TBI had complete sequences free of any stopcodons, mutations or errors. Phage was produced for such clones whichwere verified using dotblots using TBI CSF and corresponding CSFcontrols. The blot was visualized using a chemiluminescent substrate andthe blot was developed using film. The dotblots showed high binding toTBI and relatively lower binding to controls. Further characterizationusing ELISA assays were performed.

Indirect AD ELISA: Indirect ELISA was performed to check the specificityof each of the phage clones to tau variants in AD brain tissue. Theassay parameters and wash steps were optimized to yield a high signal tonoise ratio. Human brain homogenates (mix of individual samplesclassified by their Braak stage) was used to coat the plates and 2% milkwas used subsequently to block the wells. Each of the phage clones weretested with pooled ND controls, AD Braak stage III and AD Braak stage Vhomogenates. Secondary anti-M13 and chemiluminescent substrate was usedfor detection. The luminescence was measured using a spectrophotometerand represented as a ratio with respect to ND control.

The clones were initially screened with pooled samples to check if theyselected AD over control samples. From this initial assay it can benoted that several clones preferentially bound to tau morphologies in ADBraak stage III (51A, M58C and M59F) and there were a few clones (51F,52H and M34G) that preferentially bound to tau forms present in AD Braakstage V (FIG. 9). This indicates that unique tau species exist duringdifferent AD Braak stages. These clones serve as a tool in tracking theprogression of AD. Other clones that preferentially bound to both ADBraak stage III and V (M34F) indicate overlap of tau species common toBraak stages III and V. These clones serve as a potential secondaryreagent for detection in a sandwich ELISA.

51A and 51F clones had high binding ratios to AD Braak stage III and Vrespectively in the initial ELISA assay. These clones were furthertested with individual AD brain tissue homogenates (FIGS. 10 through12). They selectively bind to individual samples classified under Braakstage III and V respectively. Both these clones have relatively very lowbinding to ND control indicating that the negative panning steps againstthe ND controls was successful.

Indirect TBI ELISA: Indirect ELISA was performed to check thespecificity of each of the phage clones to tau variants in TBI CSF. Theassay parameters and wash steps were optimized to yield a high signal tonoise ratio. Pooled TBI and control CSF samples were used to coat theplates and milk was used subsequently to block the wells. Each of thephage clones were tested with AD I, ADIII and ADV homogenates. Secondaryanti-M13 and chemiluminescent substrate was used for detection. Theluminescence was measured using a spectrophotometer and represented as aratio with respect to no sample control.

Several clones preferentially bound to tau morphologies in TBI CSF overcontrol (FIG. 13). This indicates that unique tau species circulate inthe CSF of traumatic brain injured individuals compared to controls.These clones can serve as a tool in differentiating TBI and healthyindividuals.

Clones that gave a high binding ratio to pooled TBI CSF samples werefurther tested with individual TBI and control CSF samples. As can beseen from FIGS. 14-15, each of the TBI clones were able to selectivelypick out all four of the TBI CSF samples over pooled control CSF sample.Almost all the clones had high binding ratio to one of the TBI samples.This could possibly be due to the presence of high levels of TBIspecific tau morphologies in this sample which were recognized by theindividual clones. Each clone's binding ratio to the individual TBIsamples are different indicating that each clone might not necessarilybe binding to the same type of tau species. These clones can serve as atool in recognizing specific tau forms in TBI.

All publications, patents and patent applications are incorporatedherein by reference. While in the foregoing specification this inventionhas been described in relation to certain embodiments thereof, and manydetails have been set forth for purposes of illustration, it will beapparent to those skilled in the art that the invention is susceptibleto additional embodiments and that certain of the details describedherein may be varied considerably without departing from the basicprinciples of the invention.

The use of the terms “a” and “an” and “the” and similar referents in thecontext of describing the invention are to be construed to cover boththe singular and the plural, unless otherwise indicated herein orclearly contradicted by context. The terms “comprising,” “having,”“including,” and “containing” are to be construed as open-ended terms(i.e., meaning “including, but not limited to”) unless otherwise noted.Recitation of ranges of values herein are merely intended to serve as ashorthand method of referring individually to each separate valuefalling within the range, unless otherwise indicated herein, and eachseparate value is incorporated into the specification as if it wereindividually recited herein. All methods described herein can beperformed in any suitable order unless otherwise indicated herein orotherwise clearly contradicted by context. The use of any and allexamples, or exemplary language (e.g., “such as”) provided herein, isintended merely to better illuminate the invention and does not pose alimitation on the scope of the invention unless otherwise claimed. Nolanguage in the specification should be construed as indicating anynon-claimed element as essential to the practice of the invention.

Embodiments of this invention are described herein. Variations of thoseembodiments may become apparent to those of ordinary skill in the artupon reading the foregoing description. The inventors expect skilledartisans to employ such variations as appropriate, and the inventorsintend for the invention to be practiced otherwise than as specificallydescribed herein.

Accordingly, this invention includes all modifications and equivalentsof the subject matter recited in the claims appended hereto as permittedby applicable law. Moreover, any combination of the above-describedelements in all possible variations thereof is encompassed by theinvention unless otherwise indicated herein or otherwise clearlycontradicted by context.

1-9. (canceled)
 10. A nucleic acid encoding an antibody thatpreferentially recognizes TBI-associated tau, wherein the nucleic acidsequence has at least 95% sequence identity of any one of SEQ ID NO: 41,43, 45, 47, 49, 51, 53 or
 55. 11-31. (canceled)